There was a good reason for all the elaborate traps
Half the reason why audiences loved the show, was because it was an action-packed half hour of fun. In fact, most of the top cartoons in the 60’s and 70’s were full of action and violence, which incited parents to write strongly-worded letters and shows got cancelled.
Keeping that in mind, the Scooby gang never resorted to violence, but silly traps and shenanigans to catch the bad guys. Their creativity kept the show going.