Regardless of regulations or the type of ebike,
those who want to go fast and be inconsiderate of other trail users will always exist.
Important thing is education, how to operate these ebikes with others in mind whether you're sharing the road or trail on the ebike.
Fat tire ebikes have their purposes.
https://youtu.be/w2c8Yxcwq64?si=zRuKBQZkCRFDA18k
The science is clear: Electric bicycles provide a good workout (and here’s the proof)
https://electrek.co/2021/05/20/the-science-is-clear-electric-bicycles-provide-a-good-workout-and-heres-the-proof/
Believe it or not, study shows e-bike riders get more exercise than cyclists
https://electrek.co/2019/08/11/electric-bike-riders-more-exercise-than-cyclists/