By that logic everything is natural (not arguing this point), and so the adjective is redundant an unnecessary.

Are you arguing physics aren’t a part of nature…?

I... Uhhh... I'm not even sure where to start with that... Like, I see the point you're trying to prove, but in the context of your initial comment, it's confusing at best. When you see an airplane flying overhead, leveraging Bernoulli's Principle to seemingly levitate at speed (similar to how air conditioners leverage Bernoulli's Principle to displace heat outside of the area in which you want your air conditioned, and to evaporate refrigerant inside that area), do you point at it and say "ain't nature grand?!" Even an ornithopter, which also leverages Bernoulli's Principle, but uses the natural motion of birds flapping their wings, would still get you odd looks if you called it a part of nature. But I feel like you probably don't call planes or any other man-made vehicles parts of nature. Likely, you're phrasing your question around evaporation, a very natural process, but your initial comment didn't say "evaporation is natural." So, by taking my comment about air conditioners, boiling it down to being about physics, not the fact that it's a man-made appliance that you plug in to achieve anything, you're attempting to frame an argument out of context. But if you want me to follow you down your rabbit hole of bad faith arguments, then here we go! You only specified physics, are you arguing that chemistry isn't part of nature...?

natural has more than a single definition

I fail to see which one of dictionary.com’s 38 definitions of natural supports calling an air conditioner a natural dehumidifier. While all forms of air conditioning over time have used some form of energy differential to remove hot air, only the modern electric air conditioner (the kind that's actually called an "air conditioner") specifically condenses air moisture into a mechanism specifically designed to then remove that moisture from the system entirely. In fact, the original electric air conditioning unit was installed at a publishing company to control the humidity and keep the paper from buckling. The term "air conditioning" was later coined when people experimented with reintroducing moisture into airflow systems, proving that they can truly control the temperature and humidity of an area, a process similar to "water conditioning," which was a more well-known term.

you’re being intentionally obtuse

If an air conditioner's primary function is removing moisture from air, it would be just as awkward to call it a "natural dehumidifier" as it would be to call a pitching machine a "natural pitcher." An air conditioner isn't "naturally" a dehumidifier, it's literally a dehumidifier. It's naturally a white noise machine, or it naturally causes nosebleeds if you run it with the heater on in the winter, or it's naturally able to be used as a filtration system when you use it with the proper Merv-rated HEPA filter.

Calling an air conditioner a "natural dehumidifier" makes it sound like its purpose is cooling and it just so happens to condense and sink away moisture, but it literally does that by design. Refusing to acknowledge that diminishes the effort, science, and engineering that went into inventing it as an appliance. Hand-waiving that away removes people's ability to intuitively understand things like sweating (a thing that naturallycools you off) or wet-bulb temperature, which when factoring in global warming means that sweating could eventually not cool you down naturally.

Toilet paper isn't naturally absorbent, it is designed to be that; paper towel designs don't naturally prevent layers from sticking together, they are designed specifically for that reason; hard candies aren't naturally sweet, they're designed that way. Differentiating is important to demystify rather than confuse the topic.

Let me try to illustrate how the word “natural” doesn’t apply here by providing a parallel example. Everyone agrees that humans are animals, but if I went on a vacation to another country and said “I enjoyed my trip, the local fauna were very friendly” it would be wrong/not ok.

Me coming after doing some gardening and drenched in sweat: