"... +1 for removing this thread from the universe"

Disagree. Any discussion that enlightens users on how the various tools work is a good thing.

Yes, it would cripple MoI to remove basic tools like revolve and extrude.

An analogy: I have in my shop a metal lathe and a milling machine. In theory, I can make anything on the mill that could be made on the lathe. But for making round objects, the lathe is faster and more accurate. For a hobbyist just starting out, the best investment may be to start with a milling machine. But to be profitable, I need both tools to run my business.

Ed