You are somewhat out of the norm, I think, if you primarily use those points for every other resort but SSR or BWV.
Booking at other resorts than one's home(s) is hardly unusual. Some aspire to stay at every DVC resort at least once.
Most, however, have at least one preferred "home base," I think, where they stay more often than at other resorts.
Perhaps, but I see the buy-where aspect as simply buying at the resort you can afford and LIKE best. Sure, needing a multi-bedroom would currently mean you're unlikely to buy at Poly unless you can afford enough points for a lengthy bungalow stay. I think most who recommend buying where you want to stay realize that people consider all these practical concerns you listed. The "gut level" factor, which resort feels most like home for a given solo owner or family, is the one I think you're omitting. That's more what is meant by buying where you want to stay, IMO.
I don't think either is a "probably" anymore. Definitely not a studio at any Epcot resort during F&WF unless you want to stalk or waitlist.
Fine, if you and the OP are happy booking whatever is available. To each their own. I doubt that would suit very many other DVCers. Certainly wouldn't DH and me. As ever, you're certainly entitled to differ.