If we built breeder reactors we could use the spent waste fuel to power the entire US for 1000 years. That runs into plutonium existence problems, but it’s a political problem, not a resource problem.
However, I still agree with what you’ve said. We should limit our nuclear footprint to key isotope production, but we really shouldn’t be doing that until we’ve gone full carbon neutral.
Edit: In case you can’t see the reply to this comment, my conversation partner has given me more information I didn’t have before. Breeder reactors are neat, but they have more issues than I originally knew. (Still a badass concept though :P) journals.sagepub.com/doi/10.2968/066003007