I can't be bothered reading every derped out reply, but here's my $0.02. Carrying a tank in LFR on any fight not forcing a 2 tank mechanic is easy. Sure that might mean that being a tank is easy because you can be carried.
Being a *good* tank is much harder than being a good DPS though, because you have to watch everyone, everything, and correct for those tunnel-visioned damned DPS who aren't paying attention.
Carrying bad people as a tank is the least appreciated of roles.
That's not really a good way to look at it, though. I mean, by that logic, being a healer is harder than being a tank because you have to heal people who apparently only use active mitigation via typing /cast Blackout Kick. And they are typing one handed. And their keyboard apparently scrambles every 5 seconds. And it's in another room.
My point is that if you want to argue that tanking is harder or easier than another role, you have to assume a baseline level of competence for those in the other roles or it all falls apart:
Being a healer is so hard because I have to heal bad tanks.
Being a dps is so hard because I have to make up for dps who stand in fire.
Being a tank is so hard because I have to selfheal to make up for bad healers.
Situational awareness is important, and you are right in that an aware tank can help the raid. But what about a priest with Leap of Faith or Angelic Feather/Body and Soul or a Pally with a Hand of Whichever Applies Here? Basically, if you have people doing stupid things in the raid, it's not your job to counter that. It's their job to not do stupid things. Your jobs are:
Interrupts/Strat specific jobs
DPS/Minimizing damage intake
Any utility you provide beyond these is just that: utility. It makes you a more valuable player, not a better tank.