Well, that was my thought process back in 2019 or so when Tesla offered a $2K fire sale upgrade to FSD from EAP.
My current thought is that it's still basically a gimmick. Above and beyond what EAP gives you, it doesn't really serve any useful purpose (i.e. around town). You pretty much have to be monitoring it non-stop, and if anything, it's actually gotten worse in some respects, although it has become more capable in many more--just not enough to do actually useful things like truly smart summon, reverse summon, or allow me to comfortably ride in the car without having the be paying attention (the only actual thing that would give FSD value).
I completely understand your thought process: mine was similar at the time--I bought into the notion that one day my car could join the "Tesla fleet" and I could earn money with it when it came time to buy a new Tesla for my own use. Alas, 5 years later and I just don't see that happening any time soon, certainly not before my car reaches an age where I will have to buy a new one anyway. And if that happens, I am probably not interested in FSD anyway. EAP, however, is more or less worth it.