They’re pointing out that aircraft carriers are heavy as fuck and float just fine.
No electric, though. If it had electric, it would be too heavy. And if there was a shark 10 feet away? Not a chance.
Fair enough.
I guess I assumed that people were thinking of electric-battery powered boats based on the discussion. But if its just a matter of weight, we all know that boats can be arbitrarily heavy and still float (as long as they are big enough to compensate for that weight).