The reason waste isn’t being brought up is because modern designs do not produce nearly as much waste, and much safer waste, than previous technologies. Breeder reactors are able to produce more fissile material than they consume, and produce only waste products that have short half lives (less than 100 years). This is a long time from human perspectives, but it means that we do not have to design functionally indefinite storage for these materials any longer.
As much as I believe it is a breeding ground for right wing extremism, it’s a little strange that 4chan is being lumped in with these other sites for a suit like this. As far as I know, 4chan just promotes topics based on the number of people posting to it, and otherwise doesn’t employ an algorithm at all. Kind of a different beast to the others, who have active algorithms trying to drive engagement at any cost.