I've read the relevant excerpts from his book. He's more of a neo-Miasmist who thinks germs cause disease, but only in the context of being unhealthy...
Ever increasing share of the market, ever harder to distinguish from non-eebs, ever more powerful, no resources for enforcement, etc., it is not hard...
There's also a subset of the crusty hiker crowd that is salivating at the possibility of using ebikes as a cudgel to push bikes out of certain areas...
Sounds like it was a 15% reduction, not 85%. That said, prehab being effective for sarcopenic patients is entirely unsurprising. Also, anyone you can...