Ah, you know what, my friend? That's typical NT propaganda and veneered politeness. Yes, I've gotten the silly "just be yourself and accept that not everyone will like you" because they feel that the truth would be inappropriate (unless they're bullies of course, then they tell you worse than the truth!!)
I can tell you from experience that the only way I kept a close circle of friends is by gradually forcing my brain to practice behaviours and such that were not natural to me, in other words, by not being myself. I remember hearing some motivational speaker who was advising an NT audience, he said that the "just be yourself" advice is hooey if you want to make it somewhere in life, because after all, you had to learn to drive, you had to learn to do your job well, and that required advancing beyond who you were at a given point in time. His advice applies to us too, but in a more disproportionate way, i.e. we have to push harder to get the rewards.
Your last statement really resonated with me, since I worry about the families out there who have ASD kids - they are growing in numbers - and hypothetically speaking, I would hate to have to tell my ASD son or daughter what the prognosis is for them given the regrettable stories of how others with ASD have had to suffer through society's narrow-mindedness.