I mean, this is true for a lot of technologists, but there are a great many professions that allow for the kind of approach mentioned by the GP.
My grandfather runs a quite successful one-man architecture consultancy built on decades of experience and networking in the industry. He gets to pick and choose his engagements, and if he lives long enough I’m sure he can sustain his business for many decades to come.
what works now in the economy now with your skillset now etc. is not guaranteed to continue. I just think it's risky to feel zero pressure to change.