There is value in having the means to generate power independent of environmental factors (sun, wind). A stated goal in the article is also to build small-scale

There is value in having the means to generate power independent of environmental factors (sun, wind). A stated goal in the article is also to build small-scale fusion reactors, which would reduce transmission costs. Wind power and non-residential solar power also need similar transmission equipment because you can't have them in the middle of a city. The price of renewable power generation is reaching extremely favourable levels even now, but I'm not sure how realistic it is to expect transmission costs to decrease as far as you seem to expect. I'm not convinced we'll see a significant amount of fusion power in electricity grids, but for specialised applications, it would make a lot of sense (e.g., powering ships, or a hypothetical Mars colony that would like to keep the lights on during a dust storm). Building such limited numbers will, of course, do nothing to get the price of fusion power down. Maybe subsidies will be able to overcome the cost dilemma posed by this, but there's no clear motivation for providing them if the power sources replaced by fusion would already be majority-renewable.