Not predicting the computer revolution, and specifically the calculator revolution, is not their fault.

It's like complaining that you were taught how to ride a horse, but it's 1921 now and NOBODY in New York City rides horses!!!

I absolutely have done long division, when a calc wasn't handy - back when that was possible.

This was in the 1990s so calculators were common. I was born at the worst time for math education, when calculators and Computer Algebra Systems were becoming common but math education hadn't adapted yet.