You have it correct. The issue becomes the requirement for $$$ and the payment of taxes. Note that if you ran a dual payment system, it is quite possible that you could make enough $$$ to pay your taxes entirely from that part of the income and keep the BTC as BTC. Of course, then there are issues of how you actually spend those BTC. But that is all part of the adoption curve.
However, the point is that it's cheap and easy to receive the BTC. The conversion to dollars, or other currency, if required, is a separate issue of infrastructure, not an issue with Bitcoin itself. I think you understand it but globaljustin does not.