They had their own series together afterwards.
To be honest, even if I get the Champions' perspective, I think it makes sense to have an adult figure involved in nurturing and helping burgeoning teen heroes so they're not just doing all this without supervision or on their own.
I mean, obviously in-universe it's probably going to be framed as wrong because these kids are independent and get by fine without any major adult figure telling them what to do...but on-paper having kids involved with Superheroics getting guidance, even if it's mandatory, doesn't seem like the end of the world.