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

Some play the odds and win, some don't.
We have never used one in the 25 years of RV ownership. Our RV isn't packed with expensive electronics and we use the air about once every two years. Besides that, we stay at the same 12~15 different places and have never had any problem at any of them.
So at this point we don't have the need for it but if we got a much more expensive RV and traveled to new places more, I would probably get one with an autoformer built in.