I think things like diet, food additives, busy society, and work demands make it impossible for people like us to function well.
I know for me at least, I live a pretty unconventional life so I can thrive in my own way. I’m often up very late. I’ll obsessively work on something and neglect others. I’ll be late to things. I can’t do big social environments and I definitely can not handle stuff like night clubs. I need a lot of alone time to sift through all of the data that has bombarded me. It’s taken me years to figure out. But as I craft my life to work with my oddities, I become happier, healthier, and more productive.
I think for me, a better description than mental illness is “neurodivergent.” Because if I build my life in my own unconventional way, I might be able to thrive. And then when I get put in situations that don’t work for me, I become textbook mental illness.