I am surprised this obviously correct take is so controversial! The problem, essentially, is that the "more everything forever" crowd wants to get paid for the idea of the future today and then will never actually deliver what they promise. They are selling snake oil for the new millennium. Yes, of course I support space travel and settling on mars. I expect that, if we doubled or tripled NASA's budget, we could get…
100 years optimistically!? That's an incredibly pessimistic timeline, maybe one of the most hardline "nothing ever happens" outlooks I've ever heard articulated.
You can't know when the leap will happen so it's basically picking a year that seems far enough off to be pretty darn sure.