Nuclear power is (and I presume even more so will be) the best option for outer space energy provision use-case, and at the same time it does not present that m

Nuclear power is (and I presume even more so will be) the best option for outer space energy provision use-case, and at the same time it does not present that much of an edge in using it here on Earth, considering the alternatives. Consuming it on Earth here and there in small proportion just to develop and improve the technology as the primary goal makes sense, but relying on nuclear energy large scale generation? It feels like wasting this invaluable and (literally) non-replenish-able resource that may be badly needed in the future.