We do have humidity and heat and I don't enjoy it and I use A/C several months a year.
There's a big push for more cycling-centric and more cycling lanes, and the bus infrastructure is obviously a lot better than the US. I don't have a car by choice.
I haven't been to Houston but I have been to Dallas and it was an extremely frustrating experience and it feels like an awful soulless city to me.
Or Panama City, did not reach 1 mil until the 90s
And "designed with cars in mind" is part of the problem, is it not? Using that as a filter is like saying "there are no parking garages with good canoeing routes"
Those other cities have a population that is adjusted to the heat - they grew up with it, their ancestors grew up with it, they're genetically and culturally adjusted to the climate. By contrast, the U.S. South includes a large number of immigrants who are only there because air conditioning exists. It's a mystery why anyone would want to walk around in 100 degree heat with 90% humidity, because they certainly wouldn't.
https://weatherspark.com/compare/y/9247~114655~27814~113829~...
The simple answer is, you adapt (homeostasis)
I am one of those annoyed people, I want bike lanes and I don’t understand why a place with so many riders is so anti-bike (aside from understanding the natural societal inclination to think that anything worth doing should be difficult, and made difficult if not).
I think the problem is just the politicians: they probably use cars and never bike or walk in these places.
I think the thing that makes it work the way it does is, as you say, people don't openly complain. They just get out of the way, or ignore the bikers (I prefer the latter as long as a bunch of them aren't blocking the whole sidewalk). In America, they'd be going full Karen and intentionally antagonizing the bikers, or trying to start fights with them, etc. Here, people seem to just recognize it's an imperfect situation, and put up with it instead of making a big deal out of it.
Meanwhile, had plenty of occasional bicycle/scooter riders in Seattle basically destroying the flow of pedestrians on sidewalks.
And at least here in Montevideo we're literally by the beach. I am two blocks away from being able to swim :)
I do complain a lot about the heat+humidity combination and I use A/C a lot.