We know that people in history have had conditions like Autism. However even in the present day there are stark differences in prevalence in different regions of the world with modern healthcare systems (Japan, for example).
They weren’t able to stay focused on nearly anything outside of nature, excluding things that brought them anxiety.
However , this is anecdotal. They were before that able to run a semi successful cleaning business for rental properties, with the main issue being paperwork related.
Oh, I feel this. I have ADHD and I can focus on ANYTHING, but I don't get to choose what to focus on. Some days, my body decides I get to focus on Jira - and then my Jira board gets ALL my attention. Some days, I learn a LOT about data governance or clearing out old emails.
The hardest part of ADHD is to STOP focusing on one thing so I can START focusing on the right thing.