A lot of KPop fans are very organized on social media (mostly Twitter/Tiktok/Instagram) and know all the best tricks for them, which they usually use to push their favorite bands. At the same time it also gives them a lot of power whenever social issues are discussed on those platforms.
Recently, they've been involved with BLM in various forms[0] and orchestrated the "million ticket" Trump rally prank[1], so very direct involvement in politics. Whether that is "keeping democracy alive" is probably up for personal interpretation, but in general there seems to be at least a high interest in political participation.
In contrast to their fanbases, KPop artists are pretty absent from those political debates (which isn't uncommon for mainstream media stars), and don't speak out about political issues in fear they might turn away a portion of their fans.
If trying to subvert the activities of a campaign to re-elect a politician who happens to be actively undermining the democratic process isn't making efforts towards "keeping democracy alive", I don't know what is.
