I don't have a problem with his take other than saying people who disagree with him are "objectively wrong". There's nothing objective about it, and feel like this is the new "literally" where its used improperly so often that it just becomes meaningless.
Imitating the Windows UI makes things easier and more intuitive for people switching from Windows, which, let's face it, is virtually everyone.
But its not necessarily the way everyone should be doing it, because the Windows way is sometimes not the best way.
There are lots of DEs with their own opinionated way of doing things and none of them are "wrong".