It is normal tendency for people to be more involved with the outward face i.e. actors/idols, than the creative brains behind the content - directors/producers. But at least in movie industry, there is more credit given to the directors, than to Kpop producers.
Most songs, simply can be performed by any decent vocal/dance talent, superlative performers at best add 10% to the content - it is the team behind the scenes that do the bulk of heavy lifting. Again similar to movies.
For example, "Love Dive" was originally offered to Sunmi.
But of course the brand image of the performer is very important to the success of the song. IVE on the rise, made LD a hit, which Sunmi might not have, even if qualitatively she is a better performer when it comes to talents and experience.
It could be argued that Twice and Chungha are not shining in recent years, because BEP stopped producing for them and is focusing on STAYC, their own group.
But then all producers don't risk by highly focusing on their own groups. Brave Brothers neglected Brave Girls, while giving many hits to AOA, SISTAR etc.
Ryan S Jhun is giving hits for IU and Ive, while his own BugAboo are yet to make an impact.
Teddy at least is decently more know for running BP, but Pdogg ought to have more acclaim, for the popularity of BTS.
It is the typical director-actor dynamic, both are critical and actors will hog the limelight, but it is healthier to recognize the directors some more.
Similarly in Kpop - the success of a group is highly dependent on the producer, yet Kpop has not matured enough to give them as much credit as given in other parallel entertainment scenes.