Individual computer use has been common for the last forty years. By now, we know a lot about the proper way to introduce new computer applications. But we don't use what we know.
That last one, btw, was in the _1983_ book “Computer Wimp: 166 Things I Wish I Had Known before I Bought My First Computer.”
Initially, I thought of heading this thread “Why do people have so much trouble seeing the obvious?” But I’ve answered my own question.