there are two ways to maximize the amount of time you spend doing things you enjoy: find a job you mostly enjoy, or else find a high paying job you hate and work part-time / take frequent long sabbaticals / work hard when you're young, then retire early.

I'd keep in mind the possibility here that by working at a high paying job you don't enjoy and then retiring early, you reward yourself with the opportunity to do things you enjoy when you're not only old enough to have lost a lot of opportunities, but possibly significantly embittered by an unhappy career.

People don't become static creatures upon reaching adulthood, and a career you spend over a decade of your life at even in most extreme early retirement scenarios is likely to be a formative process for your personality.

I'd also suggest that you keep in mind that what people value in their careers aside from compensation is not just how easy and entertaining their duties are (easy and entertaining jobs will indeed tend to have their levels of compensation driven down by competition,) but how meaningful the participants feel their work is. Among highly qualified work, some may be highly satisfying, while some is not.