Will a submarine ever be a better swimmer than Michael Phelps? Not only do each have their pros and cons when traversing water, but I'm not sure if a submarine

Will a submarine ever be a better swimmer than Michael Phelps? Not only do each have their pros and cons when traversing water, but I'm not sure if a submarine swims anyway. I think it's more than just semantics. And I think we're not close to such a submarine or such a computer because we've been doing other things with both mostly.