What this dislike for E-Bikes touring is about in general is passion... If one has a passion for bicycle touring and sees other people on an E-Assist bike doing the same thing, they react in a knee-jerk fashion and decide it's a fail, it's a cheat, it's a non-bicycle tour, (technically correct) but overall wrong.
IMO People tour for different reasons, for some it's all about doing it for themselves, for others they just want to be with that other person and with the assist of an E-Bike they can go along on a tour and be with that person, others may need some assistance because of medical reasons, others just want it to be more fun less work but like touring...