I thought it was pretty obvious to anyone who's been a K-pop fan for more than a few months, that there's all kinda aspects and traits of the groups and idols that are appreciated by fans, that includes talent but is not limited to talent.
We're talking about K-pop idols after all, and it's K-pop entertainment companies: not just music, and not just music artists.
But the songs, MV's, vocals, dance talents, visuals, performances, rap talents, song writing & composing, variety talents, charms, aura/stage presence, all those and more are things that fans pay attention to and like about their biases and other idols, and this mix is different from one K-pop fan to another.
One K-pop fan will focus more on rap talent or performances, another on songs and songwriting power, yet another on vocals and variety talent, yet another on visuals and dance, and on and on.
Also, if fans praise one thing and loving it to bits, whether that's the songs, or stage presence, or vocals, or dance talents etc, that doesn't mean they're dissing or shading other groups - even if some might feel it like that.