I disagree with you, I happen to think that the average person is intelligent enough to make an informed decision about their computing. They just have to forgo the learned helplessness that Microsoft and Apple have fostered since the early nineties.
I don't think it's unreasonable for someone who is dissatisfied to try a few out. Let's be clear here, if you're satisfied, then you're not going to even think about moving but more and more people are becoming dissatisfied, you can tell by the number of people on Reddit (yes I still lurk Reddit) asking about switching. Also, unless you're really a geek, it isn't going to be close to a technical decision - it will be purely gut-feel. I like this one, I don't like that one.
Widgets and themes broke when version 6 was released but that was a major upgrade which changed the underlying technology (Qt5 to Qt6) and it was announced before-hand. It tends not happen with minor and patch updates.