I don't no i see separated EMT all over the place If you say it's a better conductor i believe it but some people like to use the pipe instead of a ladder or when pulling themselves onto machines.They loosen the fittings to the point that continuity is often totality lost.
Again it comes down to the installation, of course that can happen.
If you think it will be subject to that sort of damage IMO you should run it differently or install more supports or switch from EMT to IMC.
The addition of a copper grounding conductor does not mean we can then let all the fittings fall apart and that seems to be what you are saying.
Bob
