In my DH area the "more use, more damage" concept is flawed as well, regarding e bikes. Many areas are serviced by access roads that people ferry their bikes up in pickup trucks or have wide, well built up trails.
That user group is usually young and very athletic and they do the most loops. One day I overheard one guy tell another he had done ten runs - pedaling up and down two is a good day for others.
The e bike user gets an assist going up but not any more than a pickup truck. Even with the e assist they won't equal the repetition of groups being ferried to the top while they rest.