Power Protection..Why So Few Have If Really Needed?

For the past month I've been paying particular attention when I walk through camp grounds (both private & state parks) to see how many actually have power protection (not just a surge protector) for their rv. We camped 23 nights in June (5 different parks) and I only saw 7 protectors plugged into the power pedestal. These were all on large fifth wheel rvs. I talked with probably 1/2 of the owners and with the exception of the before mentioned 7 and motor coaches (which all had hard wired units) the owners didn't see the need for that kind of protection. So, 5 parks, 173 owners talked to, and only 7 with power protection that would take care of low voltage issue. Am I missing something on all the hype about needing this kind of power protection?