One thing is for sure though, its not cycling or mountain biking any more, but that doesnt mean its bad or that its not super fun.
Opinions vary. While you have the right to form your own opinion, it remains your own opinion.
My opinion is that the eMTB is an evolutionary change of the MTB that has been enabled largely by advancements in science and technology (advancements in batteries being perhaps the best example) driven by higher demand in other applications, and now being applied at little marginal cost in development to eMTBs, eBicycles in general.
I see the eMTB (and eBicycle) as an evolutionary change of the MTB (and Bicycle) rather than a revolutionary change independent from the bicycle simply because they share so many parts in common. It seems relatively obvious that for moderate cost one can now convert an existing MTB to eMTB while keeping the same frame, the same headset, the same fork, the same handlebars and stem, the same rear suspension and shock, the same hubs, the same spokes, the same rims, the same tires, the same brake rotors, the same calipers, the same brake lines, the same master cylinders and lever sets, the same seat post and seat, etc. They share very much in common. The vendors that sell those parts pay the forum owner to advertise here. Providing the eMTB subforum will likely increase his revenue from that advertising.
I see E motorcycling with pedals kind of the same. Its just something different. What I still dont get is why its being discussed in a mountain biking forum.
One very good reason for the eMTB subforum here is the aforementioned close commonality with MTBs.
Another and perhaps the most important reason for an eMTB subforum in an advertising supported for-profit privately owned discussion forum with many other subforums on inter-related subtopics would be that the owner of the forum wants it here and/or someone acting in the owner's behalf wants it here.
There are more than a few luddites here who are not satisfied with avoiding subjects that do not interest them, but are further motivated to try and force away discussion of the subject matter toward reducing exposure and promotion of something they want to terminate.