I can second this podcast. It was really quite interesting, and I'd love to hear other biologists comment on it, especially those that were mentioned. I feel like I can't personally have a very accurate picture until then
If you just feel the urge to learn things and improve your skills then that doesn't always require the project to have some practical utility. The person who will learn the most is the one who simply does both useful projects and projects for their own sake. Obviously with only so much time it makes sense to prioritize the useful projects, but just speaking generally here.
It's also quite educational and interesting when he has good guests on. I don't know why people have to judge the entire podcast based on his worst guests when there is simply no other mainstream outlet, or at least one as big as Rogan's, that has nearly as many interesting scientists, philosophers, journalists, etc. on. Yes he also has idiots on. So what? The point is the entire world steps through that studio and people blanket generalize the podcast away whenever he has someone they disagree with on, which is a sad stance to take in my opinion.
Except he's actually had trans people like Eddie Izzard on and they got on just fine, so this is obviously wrong. He takes issue with trans females competing in female sports.