Going with the "Buuuuut technically..." argument, I see? Sorry, but common fucking sense should tell you it's very doubtful he's the innocent victim you're angling him to be. He clearly expressed that he used quaaludes for women he wanted to have sex with, which is already shady given the type of drug quaaludes are and the fact they've been used for sexual assault before (Just look at Roman Polanski, unless you're going to tell me he's innocent too). They're also nowhere in same category as cocaine like you're portraying; One is a stimulant, which makes sense for sex, while the other is a depressant that can possibly render someone unconscious, which seems like quite an odd drug to use for consensual casual sexual encounters. I have an older cousin that used them regularly back in the day, and he's told me numerous times he thought they sucked for sex and were more for chilling and relaxing, similar to what people use benzo's and opioids for now, though granted that's just his experience with them.
Considering everything surrounding him, you'll forgive me if I'm calling complete bullshit on the "It was just for fun! They all knew!" angle. Now to be fair, I don't doubt maybe SOME women might have known and consented, since I'm not unreasonable enough to think he drugged and raped every women he was with. However, far too many women, for far too long (some making these claims LONG before there was an inkling of a problem and back when his reputation was sterling) have made some pretty compelling testimony regarding Cosby and being assaulted, so I highly doubt ALL of these women are just making it all up. He was almost certainly where he deserved to be.
Maybe you should consider this age old saying; "If it walks like a duck, and talks like a duck... It's probably a fucking rapist".