France nuclearized 75% of its grid in the 1980s while the solar folks were faffing around. It's not a cost issue, it's that anti-nuclear folks have choked out the industry.
We need to take the boot off the neck of nuclear. Wind and solar aren't an avenue to moving up the tech tree of civilization, which will involve using vastly more power.
What we do know is their attempt to build more NPPs now has gone spectacularly tits up, with costs completely out of control. This should make one view their earlier efforts with great suspicion. Have they become much worse, or were earlier problems concealed?
Or, maybe, it really is complicated and needs regulation to keep it sufficiently safe in a world where corners are always cut.
Life isn't Civ 6, there is no tech tree to climb.
Extending an abstraction beyond its expressive capabilities is an error IMO.