So maybe when you say that other-validation isn't bad per se, you're meaning it's okay to allow another's reaction to us to determine whether or not we enjoy being around them.
Sure, what's so wrong with that, if you're a confident enough person to accept it? If not, then the problem is with you and your confidence level, not with the other person's validation per se.
I'm saying other-validation *is* bad per se because by definition it's allowing another's reaction to us to determine whether or not we enjoy being *us*.
Only if you choose to be hurt by a negative reaction. If the reaction is positive, then why not suck it all up, as long as you can keep your ego under control! Again, is the problem the other-validation per se or your own level of self esteem?