I also think that societal norms for conformity have relaxed some. In the 50s and 60s, the baby boomer generation was so large that peer pressure to conform was overwhelming. Everyone had to be doing the same thing all the time. I think that's what led to the wild fads that the baby boomers all embraced - the insanely popular dance trends of the 50s, the drug-fueled 60s, the British Invasion, etc.
Anyone who didn't fit in was ostracized. Families went so far as to hide any odd family members from society, to avoid the "shame" of it.
20 years ago, I worked with a man from Morocco. He said that when he came to America, he was surprised at how many disabled people he saw. Then he realized that we let them out and make public areas handicapped-accessible, and in Morocco, they hide them.
I think we've only started to become more accepting of outliers in the last 10 years or so. Emphasis on started - we're not a perfect society yet, but there have been some good steps taken forward. The ADA was a good step forward. Sympathetic characters with autism or other conditions in the media help, too. Anti-bullying campaigns help. Anti-racism campaigns help. We still have a long way to go.
Interesting about the overinfluence of boomers, it's a strange phenomenon to have one overwhelmingly large peer group. My siblings are boomers but I'm not, came a little too late.