Let's put it another way to try and get a definite answer.
If there's a 200 site campground and all the sites are alike - no rivers, lakes, mountains, etc. They're all the same length of site and are all in the forest - no views. Say it's off season and there are only a handful of campers there.
So the question is, why would someone in the above circumstances, park right next door to another RV?
If they did, I think the real answer is because they need the security of people. People nowdays are used to being connected to others - all the social sites, Facebook, etc. and many constantly hold their phone in their hands checking their texts and waiting for it to ring. Folks seem to need ready access to people. That's my theory.