I don’t know why this comment is downvoted, but I don’t agree with this either because the OS (historical) conventions are different, and there may be unintuitive shortcuts on all OSes. What matters is consistency across applications on the same OS.

One point on macOS is that it’s very weak on keyboard based navigation and shortcuts for apps by default (compared to Windows). Even Apple doesn’t bother with keyboard based navigation in its own apps. One look at any app “ported” from iOS is enough. Apple hasn’t even spent time to check what the Tab key does in these apps. It’s a shame.