Earlier quoted context omitted.
I'm going to rock your world: almost nobody uses the keyword scanners in the ATSs. Sending a resume is mostly a waste of time, if you find a job you like just speak to someone that works at that company, preferably the hiring manager, and your likelihood of at least getting an interview goes up by about two orders of magnitude. Happy to teach you other tricks if you care for it.
As a 50+ chap, I had an instance of a top company, referred by friend, whole team up for it and to not even get an interview as I got `filtered` by HR and the recruitment process. Turns out they rejected me as I was `overqualified`. Equally in my early years pre PC mainstream days, there was an age bias towards older people. With many personal experiences upon that in that time/culture - including, believe it or not…
Supposedly both demo groups strongly prefer their own. Whereas us x'ers were so few, we just had to get along with everyone.