My impression is that the accused is often found not guilty in theses cases because it’s so hard to establish guilt beyond a reasonable doubt. But even if not found guilty, the accused is usually harshly punished by society and pays a big price, as is the case here.

There was a case similar to Brand’s in Canada where a handsome popular celebrity was accused by several women of sexual assault. In his case, the story was that it started out with consent but he liked rough sex, which the women did not feel that they had consented to. He was found not guilty but his media career was toast. In that case, I believed he was guilty but I had to accept that he couldn’t be proven so beyond a reasonable doubt. As SueC says below, some process other than a court trial might (would probably) get better outcomes all the way around.