Yeah, I don't like it either. But if that's the rule, then that's the rule. As nice as it would be to get the 2100 lbs of trailer weight, it was still worth my buying my 7x16 based on the 5000 lbs I can put in it. It'll pay for itself plus some in one move, and all profit in the next. Plus, there are certain items that I just wouldn't trust with movers that I can now move myself (gun safe, motorcycle, etc.).
The part that pisses me off about this though is that TMO does such a poor job explaining the reg. This is a fairly new rule and they don't tell you anything about it in your TMO brief. Like I mentioned earlier, my buddy down at Columbus didn't find out about it 'till he tried to turn his weight ticket in. You'd think they'd tell you what you can claim as weight when you say you're doing a DITY with your own trailer.