Not in the UK....
https://en.wikipedia.org/wiki/Blinkers_%28horse_tack%29
Not a great start to your post, but hey, we all make mistakes.
To answer your second 'point', I've been in many situations in light party where I ould have usefully raised a healer, but obviously could not because of the restriction. I'm not sure how you come up with it being worse since 4-man content is somewhat more forgiving in any case. Either way, I disagree with your analysis and believe that you need to remove your end-game oriented *blinkers*.
We have FOUR of them, all of them from CNJ and all of them to some degree or another useless or unusable. We're the only non caster to cross with CNJ, I already know the arguments about it being a hold over or legacy thing...yada...yada... The point is it's there, it's half of our cross class skills, and they should be useful in some way.
It's not 'pretty much the same' at all.
I'll just refer you to the place where I said I wasn't talking about end-game or raid content, and that I wish people would take the raider/end-game blinkers off and realize there's more to the game than that. BTW, your 'broken' statement is kind of pointless since we could just as well HG + Cover(healer) + LB3 Healer to rez everyone else. Either way without a PLD, it ain't happening in that specific, and very narrow situation. Of course the healer could just pop their LB3 anyway, and there are plenty of situations where PLD could pop theirs for a similarly miraculous effect. You can always come up with situations where a specific course of action saves of fails a raid wipe. That is not an argument that something is overpowered.
Answering why we can't use Phoenix Down in battle Fevelle said....
LOL, isn't that the reason for everything being OP? Either that or it will unbalance PVP...
Just how many GCDs are you burning now to achieve this, plus the insane cast time of Raise, and you still think it's OP? Come on....