One is going to be picked for you either way. Not voting doesn’t stop the shit eating from happening, just allows the lighting on fire to also happen.
By choosing the less shit option, politicians will see they need to be less shit to get elected, eventually to the point of maybe even having good candidates. Allowing the worst candidate to win tells the politicians they can get worse and still have their coveted power.
The one that wants to overthrow democracy and would like to fund the ethnic cleansing at an even higher rate/amount is the fascist. The one that has encouraged Israel to go faster / do more in Gaza is the fascist. I do not like Biden’s weakness confronting Israel, but one is a cheerleader, and one is weakly pushing for caution.