You misunderstand. Our current situation is exactly what your proposed strategy got us. You are proposing business as usual politics, and that's exactly what we've been doing for decades. And for decades, things have gotten worse. This is not working. You'd have to be pretty fucking naive to stick to the same strategy that got us to where we are today (full blown fascism).

What are you whining about? You got the genocide you wanted.

No, I think I will worry about election day, thank you very much. Voting is one of the most important ways to steer politicians toward working for your benefit. So please tell me, in your world view, what should I do with my voice and opinion on election day?

Bonus question: if you guarantee your vote to a party, regardless of what they do (such as commit a genocide, such as expand ICE, such as building the border wall, such as keeping Guantanamo bay open, such as never taxing the rich more, and so on), what incentive do they have to listen to you? And follow up, if your answer is that democrats do still work for the electorate, why are they moving further and further right, away from the interests and opinions of most Americans? (This is measurable, see for examples the 2014 paper Testing theories of American politics which found that policy positions of politicians align perfectly with those of economic elites, and with those of average voters really only ever by accident)