It might be a lifestyle thing, but sweating is not really an issue. Like, a lot of people in this country have been biking their way to school and/or work their whole life, they can handle a leisurely pace on mostly flat terrain without sweating. Biking around like that is not exercise to me, it's relaxing.
I'm not saying bikes are not a valid commuting method outside of NL. Just that in NL they are particularly well adapted
The average (non-electric) city bike speed here is probably around 10-15km/h, which makes a bike commute not any more strenuous than a literal walk (not jog) in the park. Nobody here expects people to shower after a walk. Of course it also helps that the country is very flat, the climate is mild, and cities are compact.
[1] https://www.wolterskluwer.com/nl-be/expert-insights/as-a-cli...
We normally just don't cycle hard enough to build up to much of a sweat.
However hot summer days are a challenge.
And in both countries, showers are pretty much required by local regulations in office buildings.