Partly, the issue isn't "they would have to learn about Linux, and that's bad", it's "they would have to learn about Linux, and they wouldn't want do that, and so they would get frustrated and quite likely give up on it, and my recommendation would have been a waste of their time".

The other part is that they're not necessarily wrong not to want to learn about Linux! Learning is great, when it's something interesting or valuable. But if I'm not interested in the thing, and my time and mental resources are limited, and I have a good enough alternative, I think it's absolutely fine to avoid it.

Most of us choose to drive a car that just works, and take it to a mechanic when it doesn't, rather than buying one that requires and rewards tinkering. Maybe you're into cars, I don't know, but I bet you take this attitude to at least some of the useful objects in your life.