I suppose you feel the same way about Jerry Sandusky. He was old and when he’s gone there’s no payday. It was Jerry’s age and Penn State’s millions that prompted that frenzy from those boys.
The circumstances made it easier for them to broach the secrets they held — many of them feeling (illogically, but psychologically understandably given their social stature vs. Jerry’s) that they were somehow to blame for the way Jerry came on to them.
Cosby overawed a lot of people. He took advantage of it. It almost was kept hushed up, but in his dotage he is not a formidable figure any more.