I don't get it either.
One can buy a wired $18 Logitech Gamepad F310 that works fine with Macs. It's the lowest common denominator.
Buying a gamepad from a newly-released console is fine but you need to set your expectations realistically concerning support.
I bought a PS5 DualSense controller a week before the actual console was launched in November last year. I knew it wouldn't be supported by Apple for a long time. I bought it primarily for my Windows gaming PC.
As I anticipated, Steam added DualSense support to their desktop clients within one month. That's pretty good. It still requires you to fire up Big Picture Mode to access it. When it does work, it works brilliantly even without developer support for the newly added advanced haptics and adaptive triggers.
There are games on my custom Windows gaming PC that don't work well with the DualSense controller. That's fine. I switch to my ghetto Logitech (which doesn't even have rumble).
This is just poor purchase decision making/unrealistic expectations by some folks here.