ARDuke, you don't know that. I assume you weren't there. What makes you think these women are less to be believed than Assange, a man who skipped bail and whose cavalier attitude to other people's safety has probably cost lives?
When a woman alleges that she has experienced a sexual assault, far too often others assume right from the start that she's making it up, or she's out for revenge, or she's just hysterical and making a fuss about nothing very much. Hence our shamefully low conviction rate for rape.
Nothing I've read about the Assange case suggests to me that it's trumped up. I find the allegations all too credible and entirely in line with his approach to life. But as neither of us was there, it needs to go to a judge/jury who will hear all the evidence and they can come to a verdict.