It actually CAN be done and IS being done:
sure you can make a “protection system”
but the specs are what matter.
in you example
this “protection system” would offer about as much protection as toilet paper rolls for a container ship of this size. For smaller vessels sure this kind of “protection” might save the bridge assuming they are not going upstream and trying to take out the bridge.
do you remember stuff like F=ma from math or physics class?
if so it should have been a very simple matter for you to figure this out, but that is actual science, and the buzzwords of the day like protection and cathedrals are more popular.
Do some math. don’t be like a clueless Biden who said “People vaccinated for COVID-19 “do not spread the disease to anyone else.”
Can't f^&* up the fish f^&*ing.