I think I largely agree with you; one major difference is the opportunity cost of science postdocs vs. other careers. Philip Greenspun's linked article elsewhere in the discussion is probably the best treatment I've ever read.

But I would disagree with your concept of being "secure in your position." I'm not sure that happens nowadays outside of tenured academia, government bureaucracies, and union jobs.

Perhaps you're "secure in your position" at a law firm if you're at the top of your game in terms of expertise, if the firm overall is well-managed, if you're responsible for a multi-million dollar book of business that's some multiple of your take as a partner, and if you're assured that your clients won't go elsewhere (or hire your associates to work as staff attorneys at a fraction of what you're charging). Meeting all those boolean AND requirements strikes me as a rather rare situation relative to the overall population of attorneys out there.