Too long a post to address point by point, except that I will point out that you can't cite the Rogers Commission Report and Columbia Accident Investigation Report as sources to show that NASA has not changed as a
result of the changes suggested in the Rogers Commission Report and Columbia Accident Investigation Report.
Your comment mostly summarizes as saying you don't know anything in particular about NASA processes or how they were changed (or not) as a result of the reports, but you know other organizations, and in your opinion management is the same everywhere and doesn't change. Fine, that's your opinion.
And, in response to your question, yes, I do work in aerospace, but not on manned missions.