Libs love to make analogies for electorialism, so I'm gonna try and speak their language. Imagine you're at a restaurant that only serves meat and you don't eat meat. You were dragged there by an acquaintance who insists this is the only place in town you can eat.
You have this chat with the waiter.
"I don't eat meat"
"Well we only serve meat at this restaurant and you have to order something." "No I don't."
"You're not gonna change anything by not ordering anything." "You could offer a non-meat option or even just serve me a side with the meat removed."
"Do you hate democracy?"
Wow this conversation is only a little bit less silly than the arguments for voting for a genocidal senile racist anti-abortionist union-busting SA-perpetrating pro-fracking warmongering politician who is too gullible to even be corrupt properly.
In America in the general election you vote for a lot more different positions than just the president. Depending on your state and locality you may have a few fresh plant-based options to choose from.
Making everything about the POTUS and only the POTUS is like only looking at the first two options on the menu and making assumptions about the last 50 items.