“However, building nuclear power plants requires many years of planning and construction and is expensive, while the climate crisis demands urgency and requires such large investments that profitability is paramount.”

..they say as they ignore the glaring fact that prioritising profit over everything else is literally what got us in to this urgency-demanding mess in the first place, and that depending on the "good will" of people who will refuse to act until and unless something is proven to make them money is only ever going to continue serving them, not the rest of the planet.

I think the person you replied to is valid in wondering why anyone thinks this is a positive development when all it is is more fucking around within the rules of capitalism and somehow expecting capitalism to change..