I don't think it's as big of a conspiracy as people think. Groups shouldn't be limited to making music with just their group members for the entirety of their careers.
SM is no stranger to this. SM Station exists for this very reason — allowing SM artists to collaborate with artists from all over the industry and the rest of the world (think Wendy and John Legend's collaboration).
It's just a fun and innovative project. I promise they're not thinking about charts and numbers the way K-pop stans do. They don't care about taking anyone down; they might even want to work with them. Music is an art form that's meant to be collaborative, not competitive. We've always wondered how certain members of groups sound or look together; now here it is.
The way SuperM got all the hate because they were branded as the Avengers. Some Kpop fans with their limited-made-for-fanwars-brains immediately thought it was called that to avenge BTS popularity in the west . Korean people call any collab group the Avengers after Marvel made their heros in one group. It’s not that deep. (Literally the group of idols that covered Mirotic two days ago called themselves the Avengers of Kpop).