> "It’s really not, nuclear inherently requires extreme costs to operate."

Not just to operate, but to clean up and decommission at their end of life. In the UK, for example, early reactors were built cheaply without much consideration/provision for eventual decommissioning. This has left an enormous burden on future taxpayers, estimated to exceed £260 billion, much of it related to the handling and cleanup of vast quantities of nuclear waste [1].

Thankfully new reactors are being financed with eventual decommissioning costs "priced in", but this is another reason why they've become so expensive.

[1] https://www.theguardian.com/environment/2022/sep/23/uk-nucle...