Also, the false assumption is that the solar panels would be consuming usable arable land, although of course the deconstruction of the criticism that reduces from 20,000 times to 10 times isn't listed.
There's plenty of desert out there. There's also plenty of roofs and parking lots
There probably aren't enough roofs and parking lots to run civilization plus produce enough calories to feed us. Deserts are nice but then you're talking about a lot of long-distance transmission, which gets expensive; most likely if we end up with a lot of fallow farmland closer to consumers, we'll use that.
Still a great trade going from 40% to 4%. But if we do manage some kind of really cheap nuclear, that'd be even better.