It's not 20 minutes every year. It takes all the air out of the room for the entire interval between elections. It wastes the time of the would be most politically active people for years on end.

We're already talking about "if you don't vote for Newsome you're voting for Trump"

Yes, that can be tactically advantageous, depending on your circumstances. Just leave it at that. Don't pour all your energy in electoralism, campaigning and following news around those.