How’d you get out? For the many over-specialized readers like myself…

Surely step one is psychological. I feel like being able to accept a lower paycheck is critical to leaving tech if you’re at the over specialized part of your career

That is not merely psychological unless you're very early in your career and life, with no dependents, etc.

Technically, leaving your family to live as a hermit is also a psychological decision.

Psychological in the sense that my kids will need to psychologically accept that they now live under a bridge?

That's financial and circumstantial, not (just) psychological.