fusion is also tied into another problem - there's large swathes of the business/political world that don't want to do anything useful about climate change, and

fusion is also tied into another problem - there's large swathes of the business/political world that don't want to do anything useful about climate change, and so suggesting that fusion might soon appear and solve all our problems without having to do anything hard or soon hugely advances their cause. Australia has a related problem, where anti-climate-change-action forces on the Right have pivoted to supporting nuclear fission as the solution - Australia has no nuclear fuel industry and no existing nuclear power reactors, and so pushing that has the effect of delaying any actual climate action for decades.