Sure they aren't open minded, but I mean thinking that our current state of knowledge defines the limits of what is possible, which is more specific than just closed-minded. It's crazy how often people make this mistake.
It isn't close minded at all. I would LOVE to have my thinking changed.
After listing to people who research this area like Martin Rees, Sabine Hossenfelder, Matt O'Dowd of PBS Spacetime, it just seems unlikely to me that the logistics of such travel--especially in a small craft that would just carry several beings--seems like it is just too hard to do and will remain so difficult for many, many generations to come.
