I think they were likely referring to the behavior and not the choice of shortcut keys. On Windows, alt+tab switches between all open windows across a apps, whereas in macOS, you have separate shortcuts for switching between apps vs windows within the same app.

Personally, I find the macOS behavior really irritating and unintuitive, but thankfully there are plenty of apps out there that solve this issue so it's not really a problem.

10 year old me didn’t know this. I’m comfortable enough with windows (and anything other than mac) that there is zero chance I’ll switch to the OS or their key layout, which I will concur is superior.