I've honestly no idea how warranted the rape claims in Sweden were - and to be clear, I'd tend to side with the women who filed them - but you can't just dismiss the whole thing on grounds he was escaping those charges.
In a similar situation I can't imagine anyone except the most naive idealist would have risked the wrath of US.gov (whose budget, remember, is on the order of magnitude of Germany's GDP) over miscellanea in Sweden (however important to the victims) that had 'excuse for extradition to the US' written all over it.
[1]: https://www.theguardian.com/media/2016/dec/07/julian-assange...