I don't agree. If Apple were to implement the right click > new File feature, they would just need to create the file, and they wouldn't need to care about the consequences of the app opening it or not (i.e. they wouldn't need to contact all the vendors that work with them, nor to adapt anything in their system). That's because the "Right click > new File" feature I'm talking about is just the Automator script that does the same thing (and automator doesn't care if word or excel or whatever app will be able to open the file once created: those are two different operations: creating the file, and opening the file with the right app).
Here I'm just talking about creating the file (not opening it, one problem at the time). And so again, I would personally prefer like to have an item in the Finder right click menu that allows me at least to create the file (like the touch command does), than having to do it myself.