"It sounds like it is only going to be large enough for golfcarts which doesn't seem logical, to spend time and money to build a bridge only large enough to allow golfcarts."

There are several hundred commuting workers that use the ferry each day and the waits can be up to 2 hours (personally experienced). So yes, a pedestrian/golfcart bridge is of value to the community as a whole. A larger bridge would only be of value to commercial enterprises.