>>17291203People who are ???'ing at you are delusional neckbeards who've never had any friends/acquaintances who have been fujoshi.
They've been waiting a long time for male vtubers to watch. All they'd need is decently attractive voices and a willingness to pander with a bit (or a lot of) of homobait and you've got an instant recipe for success.
It helps that the Luxiem boys have great designs and are thematically matching enough to work in group fanarts, making pairings and such easier to establish.