Yeah, I remember him on Art Bell back in the 90s and early 2000s. He's never shied away from trying to inject real science into the pseudoscience crowd. Just because he's willing to be brave enough to keep a discussion grounded in reality doesn't mean other guests invited to some event he didn't organize necessarily color his character. It's the risk of being a science communicator - you want to communicate real science to people that normally don't want to hear about it.

To be fair to a counterpoint, string theory hasn't panned out mathematically as he probably expected, so he has a bit more time to get into all sorts of things these days. I'm more so surprised he hasn't retired yet.

Sabine Hossenfelder isn't really a good foil for someone that likes to portray that they are an expert on topics that are actually outside their expertise. Here's a good video on why she is more similar to him than you would think: Youtube.

From my perspective, her takes on anything outside of undergrad physics are pretty shit, so forgive me if I don't see having her involved as a good thing.