A younger relative of mine switched to a Mac and I told her I wouldn't be able to help her with it since I am not willing to spend the time to learn the Mac OS so she needed to learn it. Then her computer was running really slow and I told her to see what was running and kill any processes or applications that might be causing the problem. I told her in Windows you hit CTRL-ALT-DEL and pull up the Task Manager and to do whatever the equivalent of that was in the Mac OS. She had no clue.
I know, this is just one story, but I can tell you more like it. I do know a few techies who use Macs but most prefer Windows or Linux. Everyone else I know who uses a Mac uses it because they don't want to have to understand how a computer works.