Because the general recommendation, throughout this thread, is to travel when you're relatively young, not to just keep travelling indefinitely. That seems to be the missing gap here. It's possible for something to be valuable to do for some period without it being a good idea to just keep doing it your whole life. (to use an analogy, someone might recommend going to university, but that doesn't mean that you should just spend your whole life doing undergraduate degrees, and you could reasonably critique either option, but not the first by pointing out that someone recommending it didn't keep getting degrees)