At the CG do you mainly use the CG showers or your RV's?

As full-timers, I can't believe how many people we have met or see that have nice rv's and do use the campground showers/toilets instead of their rv. Some are afraid to do dumps so never use any water. One couple we know uses the tub/shower for storage and has never showered in their rv. We had to show them they could fill their tank and pump water (didn't know they had a pump) at a facility with electric only. It's mind boggling sometimes.