I think the complexity of nuke subs is only justified if you also have nukes. They are ideal for a crew to go out with a complement of 16 nukes to loiter in the unknown depths for 6 months. They're just out there as a deterrent to let your enemies know that Very Bad Things will suddenly happen to a few of their major cities if they want to try to lob a few nukes first.
Other than that particular purpose, they are quite a costly way to just go out and patrol your territory. That whole nuclear supply chain is ridiculously expensive if you don't already have one set up for other nuke stuff. Drop that expense and you can get quite a lot more hardware for your money.
He seems to have this the wrong way around.
The world is the store, and he's just some person outside its front door, holding out his hand and asking US customers for 5 bucks for every item they want to go home with.