A very common mistake, and one I've come across myself a lot too.
Of course what I also know about depression (playing a devil's advocate now) is that there (unfortunately) are people who exaggerate things when life's not going the way they want it, and that leads to people easily not taking things seriously, but the point with mental things is, because people are (unknowingly) always presenting themselves better than they really feel, it's often hard to tell the fakes apart from people who are for real.
In loads of times though, faker or for real, people have hardly a clue of what they are talking about, and think that with just lecturing people. Tell them to get a grip on their lives. Telling them that there's nothing wrong with them. Stop to live in the past. I guess you've heard it all before. And have you ever experienced that when you believe they are right and try to follow their "advices" that you actually get worse than you already are? I have....
Now I suffer from Asperger myself (that was not a secret, btw), but most of my trouble is not caused by that. But by people who ignorantly tried to push me into the directions I should NEVER have gone to traumatizing me in the process. Unfortunately many people I've met are guilty here.
But then again, my godfather suffers from Parkinson's disease, and I did once ask him if he also had to deal with people who would tell him how to live with Parkinson, while they knew nothing at all. He understood my question completely, and confirmed he also had to deal with those kind of people.
And the worst part is that loads of people think I want pity when I tell all this. Nobody ever got better from pity. What I need is people who take me, my ambitions and the trouble that stands in my way seriously, and who is forgiving on those things my impairment blocks me from, and allowing me to do that what I can do best, and appreciate me for that. And that is hardly what I get from people... unless they are either professionals, or in the same boat as me.... Sounds familiar?