Timothy Walters Kleinert
So maybe there's some of that in play as well in those masters' lives.
The fact is, regular people don't do this stuff... so you start with a group which is already a bit out of sync with their fellows and then a very small group of them are the geniuses and the obsessives who will take their arts to the highest levels or even create something new. Those are the folks you read about many years later not the regular, run of the mill students.
There have always been folks who managed to be this obsessive but also pretty complete as individuals... Yamaoka Tesshu would have been one. But normally these amazing people are not the ones you look to for models you might want to use for your own life (unless you ar equally obsessive).