Researching this doesn't prevent renewables being researched or rolled out? I think the nuclear scientists developing this might be better researching this as opposed to researching fission reactors or researching renewables as this is likely their area of expertise.
Fusion is a long shot but if it was achieved it would be world changing (hopefully for the better)
They're explicitly not sending out review codes until launch suggesting that it's likely a bad game, but also means they're likely just going to try and make their money with unrefundable day 1 sales on Playstation/Xbox store