Ok, first of all, you're wrong about the Hispanic vote. They've always voted majority Democrat, and they still do. There was a small uptick in their Rep vote in 2020 and some groups like the racist ass Cubans in South FL tend to go red, but the majority of Hispanic people vote Dem. If Dems approached them like their darlings instead of us, I'm sure they could get even more of the Hispanic vote. That could guarantee wins for them given that's the fastest growing voting block in the country.
There’s a lot more to see when you look beyond Florida.
www.as-coa.org
The country as a whole is shifting left though. The Reps haven't won the popular vote in a long time. They just get saved by the electoral college, but as people move around the country, that's not guaranteed to them anymore. Traditionally, red states like GA and NC are now purple, so sure, the Dems might take a loss or two if we just stopped voting, but they would bounce back eventually.
You're basically showing you have no answer for the question. First, you argued for why your assumption was right. Then you argued for why my assumption (which I never made) was wrong. You have yet to actually answer the question which was "What would black people's options be if the Dems found they could win after we took ourselves off the board?"