I made no comment on the feasibility of decarbonising energy production (let alone that of any other sector), and won't because it's not really relevant to this

I made no comment on the feasibility of decarbonising energy production (let alone that of any other sector), and won't because it's not really relevant to this thread. I'm just arguing that fusion power won't come about without prior substantial decarbonisation, therefore if that happens it ipso facto will be replacing or adding to already clean power generation facilities.