To completely replace fossil fuel, you need a lot of nuclear plants and nuclear materials and transmission lines. For renewables you can handle a lot of the load near the consumption point and only need to transmit the “night load” which is usually much less.

I recommend you look at the estimates on how much storage and/or transmission lines are needed to go full renewable.

People will "estimate" all kinds of things according to their favored assumptions. Most are worth the paper they are printed on.

So if we can't trust statistics provided, how are we supposed to collectively discuss and reason about the options to determine the most economical one?

How many nuclear plants are required to go fully nuclear? I haven’t seen those estimates at all which is interesting