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As to the radioactivity issue, fusion would irradiate the equipment with isotopes of very short half-life, but the volume would be no more than with fission, and at a much lower radioactivity requiring decades of storage rather than millennia. It also aids in anti-proliferation as a fusion reaction won’t generate significant fissile material under normal operation, unlike fission. So it could be used in countries that aren’t feasible now with strict regulations such as maintaining a minimum lithium enrichment level.
It doesn’t produce waste isotopes directly, no, but the neutron radiation creates new radioactive isotopes within whatever equipment is in range. And AFAIK it’s harder to stop than fission because the D-T fusion neutrons are 14.1 MeV. And separately from that, it degrades the equipment:
https://en.wikipedia.org/wiki/Neutron_embrittlement
Which seems pretty significant when fusion needs so much equipment hugging the reactor chamber. It would complicate cleaning, too.
That changes with other types of fusion, but D-T is all we got now.
As for proliferation… again, it’s a great neutron source. It doesn’t have the same waste, no, but countries can absolutely use it to breed fissile material if they want.
And let’s say, hypothetically, a country goes against regulators and decides they’re going to breed material with their fusion reactor. With some trouble, they can use it to make tritium too. The supply couldn’t be cut off.