This irks me. I've also had to go through the horror that is using a mac after a life of using 'regular' pc's. To me it feels like a totally arbitrary change, to switch the alt to the left, and put a different button (which acts the same as control) in the place of alt.
I'm convinced that Apple does this purposefully so your muscle memory gives you negative experiences when you're using other platforms.
To switch it around on MacOs is basically impossible, relying mostly on apps implementing it themselves.
And there's already a good bit of parity because macos natively supports many (emacs style) linux keystrokes (for example control-a beginning of line, control-e end of line)
I'm convinced that Apple does this purposefully so your muscle memory gives you negative experiences when you're using other platforms.
To switch it around on MacOs is basically impossible, relying mostly on apps implementing it themselves.