The cost to the developer of deploying new solar / wind to a grid may become more favourable, but they're selling in to a market that reselles to retail / commercial clients, who will, inevitably, pay more over time.
I think what you're argument should be is that new nuclear would result in end-users paying more than they would for new renewables.
I'm mostly convinced where you, or anyone else, lands on the matter, is heavily biased by preconceptions...
and generally tend to think we have the resources to do a many-pronged approach, and that success is less technology dependant and more dependant on the competence of governments and bureaucracies, and the people who constitute them.