For example some E-VTOL systems have six quite independent systems, each with a battery, motor and propeller. I think it helps the design to be more fault tolerant. Helicopters are allowed many things even when they are noisier and don't have similar redundancy.

There was a scheduled helicopter between Helsinki and Tallinn. It was somewhat expensive but not unreasonable. Much faster than a ship of course. It crashed, everyone died. They continued later but stopped eventually. They are complex mechanical solutions with very high maintenance requirements.