I think the trail erosion argument is a little overplayed.
When climbing you are still restricted to a theoretical 15 mph, assuming you still have the skill and fitness to achieve this.
In reality, someone pushing it out climbing will replicate the fastest riders climbing on Strava. Therefore, I don’t see this as too much of a problem.
Many people have said that when descending the ebike is not as agile and flickable etc, which I tend to agree with, so the ebike will probably not be the fastest down the hill.
The percentage of ebike so used at trail centres will still be very low, less than 5% at worst.
Not really a viable case for the red sock lot, probably still not listen to a rational argument though.