Fair. Finding the balance for a wide audience between believable and exciting is tough. I'm usually good at it but in this case, it's my favorite concept in my field of expertise so I get a little too enthusiastic.
Huh. In this entire conversation you've come across as a person way-overstating their case, and as a result being totally unbelievable and unconvincing. And in a thread which is off-topic for the posting, which is a poor choice of a place to engage at all.
I said one thing, people continued the conversation, I continued it with them. There's a collapse thread button for a reason. Yet here we are talking.
What part is least believable for you? Shipyard construction being cheap? Floating nukes being safe? Nukes being safe in the first place? Nukes being low-carbon? Many of these thing sound surprising because they go against pop culture but they're interesting in that the scientific consensus is fairly opposite of pop culture on this topic.
Here is a master's dissertation from MIT on the topic that goes into lots of good analysis: https://dspace.mit.edu/handle/1721.1/103707