FAA's regulations are draconian, but they are that way because they are written in blood.
When shit goes south, it doesn't matter whether you're a private or commercial pilot. Your plane is coming down regardless, and worst case you might take some other people with you to the other side.
More than anything, flying is a luxury compared to something like driving which is a practical necessity or sailing which carries far lower risks of destructive danger. Nobody needs to fly, so more stringent regulations are warranted for what is a very dangerous activity that must be handled with respect.
"Diversity" has no place in aviation, either you can fly safely or you can't. People with conditions are presumed they can't, for very good reasons.