How were we supposed to know that? You haven't been setting a very good example insofar as no-selling stuff goes.

See, like your last post, the "Ganondorf just being able to magically fuse himself back together _despite the fact that the source of his magic powers has just been cut off_, and logically that would mean he can't magically repair himself" thing. That gives the impression that rampant no-selling is the norm here. 

And then on the other team we have Samus taking not a single scratch while she can apparently just use her godlike pimp-handing prowess to toss Volvagia around the room, and then noting that Link isn't allowed to do anything at all because NO NO IT ALREADY RAN AWAY ARROWS DON'T WORK.

It's like your idea of "challenge" is forcing people to shamelessly godmode because declaring your actions does nothing while you're expected to take hits from the big scary bad guy despite the bad guy getting to totally ignore everything you do without any explanation as to why. Making invincible bosses would be acceptable if you were to make it, say, a puzzle or gimmick boss, but this is just a dickwaving contest.