I think you have all the facts, but are blinded by your particular situation. The more split the fuel market is, the less desirable it is to serve, and the more pricing becomes flexible.
Every penny you might be saving on fuel has already been wiped out by the reduced demand for everything else already in GA (unless you are finding parts at some magical supply tree). We are in a situation where we cannot achieve volume. Had we 70’s level activity, you could have three types of GA fuel at most airports at competitive pricing.
Of course, the cause is legal and regulatory at the roots, and poor reaction to that in the market. My latest crazy idea is that we move to have private aircraft be treated equally. We could all decertify our planes and start buying the same things used by experimental and military and drones. People on the ground are no more in danger from my plane than any other.