E Bikes & Bike Trails

So lately I have been researching Bike Trails and have found there seems to be some "prejudice" for lack of a better term, against Ebikes or more so, what Class bike you have.

I find it unfair that a lot of times only a Class 1 bike or a 2 with the throttle disabled can be used.

I bought an E bike because I have bad knees. I find it disheartening that I can't ride places because I have a class 2 bike, or until I figure out how to disable the throttle (Which I only use for getting started from a stop). I bought it so I didn't kill my knees while biking but still wanted the exercise. I am sure I am not the only one.

Are the rules in place because of people doing stupid things on a trail or because of lack of knowledge.? Is there something ebike owners can do to educate or whatever?