It can simultaneously be true that smuggling is performed by people deemed expendable, and that the kingpins behind them might purchase an extravagant vessel ma

It can simultaneously be true that smuggling is performed by people deemed expendable, and that the kingpins behind them might purchase an extravagant vessel made for partying if they think it will improve the rate at which they successfully smuggle their illegal goods. If you bring a submarine to market, intelligence agencies and smugglers will absolutely be interested in it. That said, this is a submersible. If I understand correctly, that means it doesn't operate independently, but in tandem with a conventional vessel. So that may be far less useful.