I used to have the same logic but it goes both ways. The more accusers you have, the more credible accusations there should be. Not one accuser had a toxicology report or DNA rape kit as evidence. Here’s some example of the accusations:
Pamela Abeyta
In 1979, when she was 25 and an aspiring model,
Abeyta says in a statement that a producer introduced her to Cosby, who met her in Las Vegas, paid for her $2,500 outfit and brought her to a show. She thinks someone put something in her drink, because later in the night she says she blacked out but remembers seeing that she was in Cosby’s bed with two other naked people.
Barbara Bowman
She told The Cut magazine she was introduced to Cosby as a 17-year-old aspiring actress and model in 1985. For the next two years, she says Cosby flew her to events, moved her to New York and repeatedly drugged and raped her until she wriggled out of his grasp and he wrote her off.