Is it really waste if you can use all of its “waste” outputs for useful things? Tritium can just be rebreeded into the fusion process, so its 12 year half life will rarely come up. Molybdenum-99 is used in medical imaging and is frankly in short supply, we would eat that up instantly and the world would be better off for it. Tritium is also just very useful medically in general. The largest stable byproduct by far is non-radioactive helium which has many thousands of use cases.