[madamelic]

For a 'mono-focus' lifestyle or even a very pared down focus, you don't need to eschew everything else, in my opinion, where all you know is breathing and fine dining. You can still do those things and the author says as much as well.

You can, in my opinion, pick the reasonably best option because the payoff of squeezing another 2 - 5% out of the decision isn't worth the multiple weeks or worse you will spend. Could you get the absolutely best house for the best price? Yeah. Is it worth the trade-off of your other focus? Probably not.

There's no need for you to be a master mechanic, you just need to be good enough. So rather than trying to be "pretty good" at 10 things, you should strive to be world class / "extraordinarily good" at 1 or maybe 2 things and leave the rest between "not a clue" and "passable".

The author's call isn't to cloister yourself away but to choose not to pursue things at length that aren't what you want to focus on. You can learn to fix a specific problem, you just shouldn't spend your time going down the rabbit hole learning how to fix every problem of every car unless that is your chosen focus.

[tmaly]

I use to do all my own car repairs and oil changes when I was younger and had more time.

Now I am more partial to Naval’s saying about how you value your time and picking an absurdly high hourly number.