I don't sweat too much either but you can't discount the fact that a lot of people do and would if they had to bike in the heat

Bicycles are amazingly mechanically efficient and very low effort unless going for speed or hills.

I'd measure it relatively against the amount they sweat at rest/walking and sure, some people sweat even then.

You seem to be missing the point that standing stationary with no shade in 100+ weather will make some people sweat, even if in shape. Its a natural response, and thats before you consider your attire.

Again people can bring a change of clothes, but Ive worked places that require a suit year round, or at least no shorts. Biking around in pants in 100f heat is hardly fun.

For those that need to be in a suit, I don't think cycling would work at many times of the year. But if you just need to do some grocery shopping, then a bike with a couple of pannier bags works well.

Nah, it would be fine, I see plenty of suited salary men cycling in Tokyo

As I said, cycling is actually more pleasant than staying stationary.

If you want to argue that cycling isn't suitable in an environment in which humans should never be outside and only transfer from one air-conditioned environment to another then fine, sure, but my god, what a dystopia in which no human should live. Time to encourage migration to Siberia rather than cars.

Well, I would argue that 38C and above are hostile temperatures to humans and people probably shouldn't go outside too much those days hahaha, but it also depends on humidity. I do think cycling is suitable even in those places, and I personally cycle under those circumstances, but there should be a temperature controlled public transport option available as well.

True but maybe they would be less sweaty if they were bicycling more and in better shape :-D

Trikes are not a nice solution for people who get hit, lose control, or crash into something.

Again its the consequence of something, even if its your fault. Obviously speeding in a car can kill someone, but fender benders are pretty common and mostly harmless. Also obviously most people can fall off a bike and be fine, but for the elderly a simple fall can be life altering or even lethal, and thats before you get to the physical issues.

For an elderly person, losing control or crashing on a trike is a low speed non-event.

A car driving so dangerously, so recklessly, so without any care for humanity, to hit a slow moving bicycle is homicide. It's an outrage to ever surrender the road to criminals. No-one should ever accept such a mentality.

Disagree. The President himself bit it simply getting off a bike. A trike does not avoid the need to dismount.

They are nearly as easy to dismount as a mobility scooter. They are stable, no balacing and typically no crossbar so you just swing your legs across.

https://jorviktricycles.com/tricycles