You're claiming that the main reason most people don't switch to Linux is some sort of deficiency of judgment rather than anything practical, and that's not true and it's never been true.

You dismissed the costs of getting used to a new OS right off the bat, and that's a real thing. In my link that you dismissed, the first sentence ("while Windows is very hostile ... to its users, it's rarely broken or buggy") is relevant to most users. Professionals may have trouble getting their apps to work, gaming has gotten better but still has the same problem. If user literally only cares about running a web browser, then yeah, Linux would be fine; but Windows is already fine, so why bother switching?

I like Linux. I've used it at home and professionally. I'm a huge fan of FOSS principles, and I think it would be better for everyone if more people used open systems. But Windows works well enough to satisfy most people, and they're not going to change purely for ideological reasons. Maybe it'd be a better world if they did! But it's not reasonable to expect them to, or to cast that as a failure of judgment.