@OT @grayruby @elvismercury I want to reply the 3 of your messages with the same message.

There is certainly value in someone who can do a little bit of everything, but not focused on one thing. Take construction for example, in different construction projects, some general contractors / builders would have a "handyman" who is a jack-of-all-trades on payroll or on contract, while others do not hire such a person. The projects with the Jacks would always progress smoother, faster, and with less problems, because the Jack is there to solve and fix smaller problems promptly, without having to wait for the particular professional trade of the related problem to come back to fix them. Sometimes, the Jack would even do a better job than the so called "professional" because some Jacks are detailed oriented who care about their quality of work.

Maybe being a good Jack, being good at doing it all is a form of mastery in itself. That there is a certain level of mastery required for being a good Jack. Maybe I've been thinking about this wrong, thinking that mastery is field specific. Maybe mastery is a mindset and methodology of completing tasks rather than being task specific. Or maybe I'm just spewing nonsense...