Sure, just remove everything except the "commit", "push", and "pull" commands. But it sure gets a whole lot less useful then.

Yes, provided you're willing to give up all the complex ideas that make git more useful than Dropbox for some things.

I imagining a scenario in which I have a team and I have 10% git experts, 90% not -- can I create a system in which they are basically "drop boxing" and the merging etc gets handled automatically or decisioned by an expert? -- Maybe ultimately everyone should just learn git since it isn't that complicated.

I've been in such a scenario. Making it simple and drool-proof for some people while everyone else works around the consequences of that is not as lovely as it sounds. It winds up being much, much easier to just teach whoever else enough of the basics to use git.

It's almost certainly less difficult to use than whatever ERP the company uses.

Probably: http://tonsky.me/blog/reinventing-git-interface/

(And no, you don't have to give up any power).

No, because Dropbox does not support branching and merging.