Kpop as an industry will be fine. Hollywood had stuff like the Weinstein and Epstein scandals, both of which were bigger than school bullying, and has ticked right on. Heck, the ex-President of the US got caught paying off a porn star and the world didn't stop turning. Korea is a conservative society, so certain stars may be affected if allegations can be proven, but the industry as a whole will be fine.
What you may see, however, is companies vetting their trainees more thoroughly (talking to classmates, etc) so that you don't get in SEVENTEEN's situation where an established group gets caught up in one member's scandals. You may also see some companies start pulling the members out of school at earlier ages as a preventative measure.