Doing basically anything to help the Harris campaign is more useful than rehashing the very worn "why you should not vote for a third party candidate in protest from the left" debate on a niche microblogging website.

Yeah, ok. Excellent point.

If someone proudly stating they do not care if Trump wins and there's no difference between the candidates upsets you - it is designed to upset you. Channel that into doing something useful instead of arguing with someone performing a ritual to make you angry!