Text on buffers are disposable (e.g. cut/pasting text) but files are not, as losing one can even be a tragedy without backup so I don't see much logic in treating them the same, specially since the mental overhead becomes a burden to the user (oh I'm pasting a file so I must remember to use the special command to cut a file) instead of putting the burden on the machine, specially since reducing mental overhead is arguably the sole purpose of the machine.

And the focus of that complain was that the edit menu does not clarify in any way that the "Cut" command there is only meant for text, it should be renamed "Cut text" or something that the user can easily understand to be intended only for text.