The reason people "can't learn" how to operate alternative software is because we don't give software the weight it deserves. We don't consider it crucial, but evidently it is.
When a new surgical technique is standardized, we don't tell doctors "well don't worry about it - we can't expect you to learn cryptic things!" Because we understand the gravity of what they're doing and how crucial that technique may be.
For whatever reason, software is still treated like the wild west and customers/employees are still babied. They're told it's all optional, they don't need to learn more. We still tell Windows users its fine to download executables online, click "okay!" and have them run as Admin. And that's the root cause of why we're in this mess.
We have safer computing environments - just look at iOS or Mac. Even Microsoft is slowly trying to faze this out with the new Windows store. But alas, we cannot expect anyone to change anything ever, so we still use computers like it's 1995.
Assuming that other operating system, whether high-reliability or not, are necessarily "cryptic" and unnecessarily impair people in their ability to "get shit done" is naive at best and disingenuous at worst.