That's the beauty of a long-term commitment. You are stating so much confidence about the future that you say "yes, we can have a functioning society and set aside these resources".

Sure, you can create scenarios were that fails. You can do that for anything. The power lies in saying "we are willing to remove these paths from consideration because we as a people are committed to not letting them occur".

It's a model that fails if you apply first-order utilitarian calculus. But the intangible value of the hope and commitment in it likely overshadows any immediate gain. This isn't about how to maximize utilization or optionality. It's a bold statement about who we are, and a lodestar to aspire to. (Which is, ultimately, the job art does)