I hate to bring the anxiety thing back up, because it faded away two pages ago, but I've been busy and just now read it.
I see both sides of the discussion and have no idea (not being a doctor of psychology or psychiatry or any other kind) but felt like I should share my two sides of the story.
I never understood how people could get to the state where anxiety (or depression) crushed their spirit and caused so much turmoil in their life. I went through two VERY difficult divorces, that had me thinking crazy thoughts, and doing stupid things that I knew better than to do, out of desperation. I didn't turn to drugs, and by the second one I had given up alcohol and didn't go back to it either. I've always thought I was a mentally-tough individual and felt I could soldier through any situation.
People's brains ARE definitely wired differently.
Enter my youngest son. He is also a very mentally-tough individual. He was diagnosed in 2nd or 3rd grade with ADD. He has been off-and-on medications ever since. In spite of his ADD, he was a 3.96 GPA High-schooler taking all the AP and advanced courses. I feel the .04 in that grade point started his anxiety caused by a teacher that was an idiot. He had a class with seven 4.0 students in it, and only one came out at 4.0 because the teacher had a grudge against 4-pointers (he wasn't one himself). Anyway, at U of I my son (who was very confident in his abilities as a student) had run-ins with a few professors early on, for various reasons. I'm not a parent who thinks their kids are blameless, but would have stood up for him in most of these situations if given a chance. Anyway, by his third year, he was suffering from some huge anxiety issues, and I couldn't understand them from my point of view. Eventually, he went on meds for a while and is currently off those and ADD meds and is coping fine, but his struggles have shown me that even the strongest people can battle those issues, and it's not just mental weakness on someone's part that can lead to anxiety and depression and often those people close to them are helpless to see the problem or help with it.
Sorry for the book here, but felt it might help others to hear some of this.