I was watching an older youtuber talk about this. He said basically once you hit it big in youtube you get a level of love you didn't know you needed. If you try to leave forever you'll just feel empty. He tried it and it didnt work, so he's back to doing his thing. (albeit more casually)
We're gonna be coming up on a very weird period soon where most content creators ARE gonna be too old to be doing what theyre doing (especially pretending to be anime people) but they dont wanna leave, shits gonna get awkward.
I know it sucks to think about graduations but you gotta be there for your oshi so they can move on with their head held high.