Even with a good way to check the weather unlike a single ship, boat operation go / no-go decisions are still going to have to be coordinated with shore-side. Otherwise what if some boats canceled, some changed up the schedule and others ran? One decision is going to have to be made for all boats, just for practical reasons.
Also in an area known for derchos it would be imprudent for the company to assume that each boat operator is going to make the right call every time.
Another factor is that for the sake of smooth operations decisions effecting schedules should be made as early as possible minimize disruptions. Waiting for the boat operator to arrive at the launch site to make the call is going to be too disruptive to operations.
Having a single operation manager for all the boats is the only approach that makes practical sense.