Yeah...I applied when I was job hunting at the beginning of the year and I hard stopped on the high school question. I've got over 30 years of relevant experience and if that's what they're asking, I'm obviously not the sort of person they're looking for.
Implicit ageism describes it well. Was it age discrimination? I wouldn't go that far based on what I saw, but they either don't want older/experienced people or they have no idea how bad that looks. Either way, I had options so I didn't go any further with them.