Bullshit. If you can get the same amount of reliable power by just slapping up some solar panels, wind turbines, and batteries, then obviously the cost is not insignificant.

I'm thinking in practical terms how that still doesn't happen that often, humans allocate assets, humans don't behave logically (behavioural economics).

Nothing ever is going to be perfect and efficient, solar panels might get through vast price volatilities as well, installation costs hand already soared.

Then, at the same time, they'll ignore the most bone-headedly obvious cause of nuclear's failure: it's just too fucking expensive.

So why did we subsidised so much expensive oil infrastructure. And at higher cost of life.
Oil rigs can go into billions of dollars (and thats not even the total cost), nuclear plants tend to have the total running cost up-front (with decommission costs after the planned decades).

Humans don't make economic decisions rationally.