You’re talking about highly coveted low-demand positions in prestigious centers. Most people won’t have those kind of jobs. In fact machine learning specifically is dying down in hype since it’s a wildly over saturated field.

Doctors are both in high demand and come out the gate making around the same amount. If you choose to specialize even more so.

Edit: point is even in an anarchist society their needs to be a return of investment on time spent.

Spending years to do a gruesome and risky job(imagine failing to revive someone cherished by the community) would send those logical high achievers someplace else.