My point is the submarine is designed to work. That is, it's not the end-product of a virtually endless chain of prior random events that somehow ended up by (serendipitously!) getting it "just right" to do what submarines do.
Surely you can discriminate the difference between "design" and a "crap shoot" that somehow gets things right by accident.
Natural selection is not random either. It is a trial and error process that keeps designs that work and discards designs that do not work.
Check out “directed evolution” as an example of how novel enzymes are made for industrial purposes by random variation and selecting for the necessary traits.
It is a MUCH more powerful system for designing enzymes, right now, then attempting to design an enzyme with the necessary traits on paper and then making it in the lab.