You probably know that the PC == Windows and Mac == Apple association dates back decades and while I know where you are coming from I don't see much value in pointing it out. Everybody knows that saying PC for a Windows Machine is not correct, but that terminology somehow sticks

It's like pointing out that it should be GNU/Linux instead of Linux every time (I do sympathize with the GNU Project in some way though), or that Linux is not an OS but a kernel and so forth...

We all here know the truth(s) but you won't change what terminology the public uses, so we should be somewhat relaxed about it (imo)