It's a nice ship...easy to get around. Nothing is too far away. It's showing its age in some ways. Windows that need replacing, rust, elevator buttons in need of repair. Nothing major though.
I thought this was a restriction on cruise passengers, and not on people that access the area by roads.
Anyway, they're not preventing people from using any oceans, rivers, or waterways (or roads).
Venice is doing fine without cruise ships. In fact, they are still so overrun with tourists that they will be adding a fee for people visiting just for the day.