I live in a relatively cool climate but it gets to a high relatively humidity. I don’t think it has anything to do with my sweat glands - if it were then I would overheat easily because I wouldn’t be sweating enough, right? It’s bizarre to me that you think most people in most climates can’t walk indefinitely without sweating - walking shouldn’t be an exertion unless you’re climbing a steep hill or are seriously unfit. Sure, in a hot climate in summer, but there’s a lot of the world which is not that.

I do cycle pretty slowly (about 10mph) so if your journey is onerous at that speed but doable at the speed limit of an e-bike than that would make a difference of course. Still, I think people get too fixated on cycling fast in some countries where cycling isn’t the norm because cycling is seen more as a sport than as transport.