It could, but beaches aren't roads. What if someone was sunbaking or laying on the sand in an area they thought was safe? Are they allowed to be.run over because they weren't keeping a close eye on every vehicle movement in the vicinity?
In my experience, vehicles don't stick to any one particular "lane" on a beach so allowing them to use it as a road means the beach is now entirely unusable for anyone who is not in a vehicle.
You shouldn't have to post a guard to ensure a member of your family is able to enjoy a beach without fear of someone in a vehicle killing them.