idk when you've been a kpop fan for a long time you get used to it, but i understand the sentiment if you only became a fan recently and haven't gone thru the generations
like im mainly a 2nd gen stan, got into kpop around 2010 and basically all of my favorite groups which were from that era either aren't active or have disbanded. back then i was upset about it but you just learn to appreciate their music and support them in their individual activities if you wish, or you move on and start looking at newer groups with their group careers ahead of them