In a democracy, if there is no alternative we have to vote for the lesser of the evil. It’s better to keep things worse, than to make it more worse, if there is no alternative. If an alternative is there, then absolutely. We should all be encouraging an alternative system in a democracy. But if nothing’s is available, then this.
On the safe voter part I agree. Never promise anything. Ask question on what developments have the parties brought to a place.
BTW I am not American, but democracy is democracy doesn’t matter the place. Earth is Earth.