High luck increases successes, not low.
My statement was referring to a post by you in a different thread:
Post wipe Living Anatomyas in low Luck builds receive a bigger boost. Obviously higher luck still means more successes compared to low luck. Sorry for the confusion.
As I remember conceiving the idea, taking LA would make it useful even if you didn't pump your FA way up and a useful little boost for dedicated medics.
Is the requirement for it so high that anyone with LA is automatically a super healer anyway?
Well, at this point it seems
only useful, if you didn't pump FA way up (which it very well might be, that's nothing I could judge), since no dedicated medic would leave FA at 150.
Which is the requirement for Living Anatomy, so relatively high. Also it sits right between Blessed Are The Weak and Medic in terms of requirements, both fairly dedicated and potent medic powerhouses, so there's a bit of an implication that it may actually do anything for the people you mentioned that actually do want to play a medic. And that you call it a medic perk kind of reinforces that a bit.
Anyways, if the perk is more geared towards the not quite so dedicated medic or someone who just happens to have FA tagged for some other reason, I'm in no position to judge its' validiy anymore, however in that case the perk description is rather misleading.
I would also suggest to rework how FA fail/success is done, because right now
person with 6 luck and 1% FA fails less often than 300% fa doctor with 5 luck.
Which is a bit strange. Medicine isn't gambling, mkay?
I also agree with this. Although bias may be involved.