I suspect the answer is rather high. I had similar experiences getting back into tech when I decided archeology wasn't the field for me. I had about some years

I suspect the answer is rather high. I had similar experiences getting back into tech when I decided archeology wasn't the field for me. I had about some years of experience paying my way through college with contract dev work, but after several offers were retracted once a execs saw my background I managed to find an old school hacker in SF said yes. They were filling in while the real boss was on medical leave. When the real boss got back, I was immediately informed shouldn't have been hired despite doing my job well. Years and companies later, I've brought it up in those diversity hiring meetings, but that's not the sort of changes that are being sought at most places.