Earlier quoted context omitted.
The job security issue is huge. Many of my tech and finance friends in their early 50's are getting pushed out of their jobs, while my physician friends in their 60's can keep their career as long as they want. A family member recently visited a dr. in his late 70's.
Difference is that in tech you can retire with 50. Few people who still work at 70 do so by choice.
Tech is boom/bust. Ask a grandpa who worked for DEC in the 80s how that worked out for him.