4/ what is actually difficult, and worthwhile, instead is to do ONE single thing for a very, very long time. It's much harder and much rarer and results in outlier outcomes much more often.
A friend of my parents spent more than 30 years building a famous watch called "jens olsens world watch" in half size by hand (as in litreally everyhing is done in hand also the wrenches which for some of them takes 400 years to go around their own axis)
This is on top of a bunch of other things he built. If there is a modern day da vinchi he would be it (he paints, plays music, writes assembler like it's an artform, understand mechanical engineering and electrical engineering he reversed engineered the Mac2 back in the days, I could go on)
He never brags about it so I have to do it because I think there are far too few people like him left and they are the ones who really do things in life.
There is much to be learned by someone like him.