I'm not speculating about anything. They made a claim and provided nothing to evidence it.

Similarly, the other side have made a claim which - apparently - was accepted by the registrar.

Why does Occam's razor not say that the claimant isn't lying?

FWIW, I think Itch are probably right. But there is a lot of IP infringement on there. Is it unreasonable to think that one of those page might have a phishing form on it?