I’ve seen Luke talk about it a little, and at least during the clips I watched, Github wasn’t mentioned. If he specifically says somewhere he’s only looking for open source coding projects, then sure, that’s a little unreasonable.

More generally though, there are plenty of hobbies you can talk to an employer about that could show “passion” without being programming. Personally I enjoy working on my own car, and I’ve talked about that before as a side project in interviews. If your hobbies require any skill at all, and aren’t just “turn your brain off and watch YouTube”, it will help you in just about any job. And from what I’ve heard from LTT, they’re not really any different.