It's a double-edged sword -- the biggest problems of K-Pop are that the industry has no sense of longevity when it comes to idols, and the fans don't have a sense of history. Now until one of those sides is fixed, the other will remain and of course as fans, the easiest way is to start with ourselves. I've tried breaking the importance of this historical mindset within the K-Pop news writers, and honestly, none of them want it to happen, because they think the fans won't understand it. If the news writers don't want to start it, then it has to come from the fans. I don't think anyone wants to be considered stupid by anyone.
Everything starts with a sense of history. If K-Pop wants to continue pushing idols as the majority of the industry, fans have to know why, and they have to at least be able to understand how everything works, and how things came to be.
I completely understand that a lot of people don't like the idea of "history", and as a kid I despised history class too. I didn't like memorizing names and dates and places and listening to lectures about wars and colonization, and I'm sure there are a lot of people who felt the same way. However, I realize now that I hated history because I didn't understand it, because I was just memorizing empty facts and not using it in everyday situations.
All you have to do is go back a little over a decade and start from there. Earlier idol groups like H.O.T., G.o.d., S.E.S., Fin.K.L. Shinhwa and of course Seo Taiji & Boys were massively successful with local consumers, and sold albums in the millions. Look up a video of an H.O.T. concert and you'll know why. Because of their success, newer generations of idols and idol groups were launched -- Rain, BoA, DBSK, CSJH, and later Super Junior, SS501 and Big Bang. DBSK's debut was significant because it was a time when solo artists ruled music shows -- watch even just one of their Mutizen song wins and observe the other contenders for the prize. BoA and DBSK worked for years in Japan before cementing themselves as the frontrunners of the Hallyu wave -- DBSK became the first Korean group to make it to the Kouhaku Uta Gassen in 2008, after three years, three albums, and over twenty singles.
Knowing all this will help you understand why everyone's moving to Japan, why fans are up in arms over something, why this person said that, and basically everything that's happening in K-Pop these days. Honestly, don't you want that? A sense of history and understanding?