I've had a great many conversations with land managers and people who maintain trails. 100% of them have a big problem with e-bikes with throttles. I've also sat in on focus groups where cyclists discuss allowing e-bikes on trails. Again, 100% of them have a big problem with e-bikes with throttles. A majority of the cyclists will at least tolerate straight-up pedal assist bikes.
I found it interesting that the Class I/Class III distinction isn't generally considered as big a deal as a throttle.
The choice we're going to be forced to make, I suspect, is whether e-bikes be allowed on bike infra of any kind or whether e-bikes can have throttles. That isn't a fair or even reasonable decision, but as adults we need to acknowledge that at times the options we are faced with are ugly and few. It is not going to be possible to persuade and educate enough people to effectively change that fact.