Economically viable fusion power uses the fusion reactor in the sky beaming energy to us for free that we can collect with relatively cheap, simple, decentralized, solid state, and extremely long lasting (decades) power transmission recievers.
No disagreement, but nights and clouds are inconvenient and remedies are also expensive-ish. We need both.
Why solar aficionados consistently forget about the night and intermittency in general? It's not like diurnal and seasonal storage will pop up for free and the energy grid will reorganize itself.