There's a place for hardcore html coders and for html websites generated by software (which is what XWD does). There used to be similar arguments about not using assembly language for programming, but it's used only in specialist situations now.

I think hardcore html coders should just ignore XWD and chuckle to themselves at the way it works. In the meantime XWD users can smile that they aren't wasting their life worrying too much about HTML.