This is not why I shower every day. I show every day because I exercise (and sweat) every day, and because showering and being clean feels good.
Good for those who can skip it, but as a member of society, I prefer to stay clean.
Meanwhile I'm sweating like a hog in my tank top just existing. God forbid I move.
The only explanation that makes sense is that articles like TFA are written by those in the former group, so showering daily really is performative.
When I moved to a place with much warmer summers, the first year was awful. I could barely go outside without looking like I just came out of a sauna. Several years later, living without air conditioning and mostly walking everywhere, I was one of those people wearing pants and long sleeves in the peak of summer without sweating. 100F was just another warm day.
Since then I've moved to somewhere much cooler. I sweat profusely when it gets to a mere 75F. I just never trained my body to adapt.
To pivot back to the original topic about showering, people who shower every day strip off the body's natural oils that keep the skin moisturized. In response, the body produces more oils to maintain the integrity of the skin. And then some people want to shower more for that "clean" feeling and the problem gets worse.
In a sense, your body adapts to your daily showering, so when you abruptly stop, you're gonna smell.
In a similar sense, people with long hair are regularly advised to only wash their hair occasionally, because washing removes all the oils that their body generates, leading to dry hair that breaks easily. But people with short hair claim they have to wash their hair regularly because it "gets oily" when they stop.
I've lived in hot places my whole life from Texas to Mexico to the beach, the latter two I never even had A/C for 10+ years. Clearly some people are like me and some people aren't and it has nothing to do with acclimation.
Meanwhile my girlfriend who barely sweats certainly didn't train for it, come on. Though she immediately overheats in the sauna which is the only time I feel some satisfaction on the matter.
Brushing teeth, masturbating or just plain "enjoying warmth" is quite wasteful.
Funfact: In ye olden days peasants were cleaner than nobility. Because they got dirty every day and had to wash (with cold water in a stream). Nobility never got dirty and baths were cumbersome luxuries inside a palace (takes a lot of buckets to fill a bath).
This got so bad that the french had to invent perfume to make Versaille livable.