The left hates Cuomo and Adams, they are right wing:
Cuomo is appealing to republicans when he said he would move to Florida is he loses:
https://www.i24news.tv/en/news/international/americas/artc-former-ny-governor-andrew-cuomo-says-he-will-move-to-florida-if-zohran-mamdani-becomes-mayor#:~:text=Recommended%20%2D,This%20article%20received%205%20comments
Adams is flat out pro trump:
Mandami is the sole left wing candidate in this race.
But if Adams and Sliwa drop out and endorse Cuomo, then the right winger (Cuomo, who "joked" about moving to Florida if he loses) wins NYC (right now, it looks like an 11 pt victory).
https://www.youtube.com/shorts/-NnNJGWhpzw
Cuomo's S.A. scandal is irrelevant; S.A. is a misdemeanor. The left was fine with Waltz committing DUI (another misdemeanor). I don't hold misdemeanors against politicians for the rest of their lives. Waltz and Cuomo are to the same standard.
But if the left loses NYC of all places (D+38 in 2024), then what does the left do after that? Do they just give up and start, "identifying as republican" to advance their causes?
If you want to get rid of the 2 party system (which left wingers are more likely to support), then that is the same in effect as having just one party, where the term, "republican" is synonymous with the term, "politician".
If democrats want things like Medicare for all, then they are more likely to get M4A if they identify as "republican" than as, "democrat". It's why TX gets a lot of credit for having no income tax, but WA doesn't. It's why the GOP accuses MA of having high income taxes, but not Idaho or South Carolina.
Democrat vibes feel sus and republican vibes feel badass. But if everyone identifies as republican, then the vibe factor goes away, you get the same effect as eliminating political parties, and any policy you support is more likely to actually get enacted. A political party is just a label.