keeping worse people out of office is in your best interests.
Simply put, thats not how voters work. Voters just donʻt respond to lessor evil voting. If you want to win elections, you canʻt expect people to behave in what you personally think their best interests are. If you want to win elections, you need to activate people and give them someone they can positively vote for. Otherwise, you are strategizing to lose (see 2016, 2024, and every failed campaign that relied on this same white supremacist interpretation of what things mean to be strategic)