+ Def capping renders Redoubt useless, meaning prot paladins are actually playing with 46 talents not 51, in practical terms their block chance will always be lower since there is no equivalent to warrior (or shaman) shield specialization. Paladin shield specialization only affects block value.
We have Holy Shield for more Block , Def cap automatically make Paladin mitigate far more damage from Shaman and we have too high Block Value not only from Shield Spec but also from extra Strength from Divine Strength.
+ Any silencing move renders a protection paladin useless.
I remember tanking Kurinaxx years ago with my warrior, and the sand bombs that he can occasionally spawn right under your very feet (easy to see as ranged, harder to spot as melee while staying on top of the threat table) will silence, making you unable to even taunt. You have to get around the tank swaps by using mocking blow when that happens.
We have bubble (clicking to instant remove) to remove this silence and re use our abilities , Seal of Righteousness last 30 Seconds and no silence can interrupt it , our aggro is based on jotc/sor and return damage so Silence is nothing that will affect us on anything .
+ Any magic immune/high resist mob means a paladin can't tank it.
There is no resistance to Holy and the only mob immune to holy is from BWL which usual is kited/tanked by Hunters (only mob) .
+ Tank swapping is much harder to accomplish due to no taunt (Kurinaxx is a good example again).
not a big deal at all , Bubble will remove your debuffs and automatically you tank twice in row , Warrior later will taunt but will not do much aggro , your auto swings with SoR will automatically get back aggro once debuff is gone (if you have control over your KTM) .
+ Paladins don't have any emergency buttons on them, akin to Last Stand or Shield Wall, or even the Druid's move that consumes rage and turns it to health. Only LoH would count here, on a cooldown that is 6x longer than last stand and 2x longer than shield wall, and that will not grant the armor buff since well... prot paladins never spec it. On top of leaving the main tank manaless (good luck with TPS at that point)
We got Bubble to remove our deadly debuffs , we got LoH , we can get def cap , we have tons of extra block value that automatic make our Block mitigate huge amount of damage , we have tons of armor to reduce all that damage income , this is what shamman don't have and will never have , (including druid that never have def cap).
With good gear there is no need for Special emergency buttons since adds/Bosses will never hit you deadly and with simple Greater Stonehield Potion we fit out Armor Cap.
Secondary:
+ Paladins can't interrupt spells on non-stunnable mobs, like a warrior can with shield bash. They need their team to do it for them.
That's why Rogues , Fury warriors exist ... GG
DIfference is, I always take more dmg than a protection warrior would due to no defensive stance + lower block chance, so I always do the efficient thing for the team and if there's a prot warrior, I switch to healing, for which I have gear as well.
When you are armor cap , you take far lower damage than Warrior due to Block Value on Shield and your Shield will block tons amount of damage.
Def Stance = damage reduction before armor which leaves warrior def stance 75% worthless and 25% only useful , which mean if Target hit for 1k , def stance will reduce only 25 damage, while Block Value from Paladin is linear and after damage reduction , which mean the block with full amount damage will occur.
If duki feels so personally vested in playing a protection warrior in spite of all the above, and seeking to main tank raids, regardless of the bigger strain you put on all of your raid due to your spec,
It's not what i feel , the game officially 3 tanks are and always been Druid,Warrior,Paladin . This is official on every single Expansion that exist , they all have all the tools required for Tanking .
Also it's not what i feel but what i have already Done where no Shamans or anyone have or can Tank any Raid Boss in Naxx or Trash when your Raid is top knotch to "Full DPS" on pull.
But if I mention that I will roll shaman tank, then don't act outraged "comparing frogs and rabbits" simply because my idea might be even more difficult and inefficient to play.
Nobody got outraged on anything, it is only you who is messing with my tanking comparing frogs and apples "if paladins can do then shamans or priests can do" which makes absolutely no sense at all.
As said previously: If you care about efficiency, then roll a protection warrior, if not, and you're playing suboptimal specs for fun, you don't get to judge other people for it. Period.
You know nothing about efficiency , if you want efficiency you should have from every single spec in your raid in order to have best tools for every single Boss in Game that exist, which make Paladin and Druid also efficient due to their far greater benefits toward "specific" fights which are much better on those fights than Warriors.
And at the end of the day i am not here to say "if dr.doom" can do it then i can do it because this is edge of madness .
I have already done all this stuffs before i engage toward any conversation regarding Paladin Tank and i have already experienced them before i talk about them.
Where you can only assume regarding your facts.