You missed the word “some”. The human body had millions of years to evolve to a point where companies seem to think they can replace essential functions of it? Where is the logic in that? Some people (I’ll make sure to emphasize it) have skin issues yes, because nature isn’t perfect. They might need some product to help out. But by far the majority will be just fine without them.
I agree with the sunscreen, although I wouldn’t use it if I wasn’t planning to stay out in the sun for long, but that’s about it for an average person. Your body is supposed to hydrate itself, and getting dirt and grime off is the function of a shower. I’m sure not everybody’s skin hydrates itself enough so they would probably need to use a moisturizer, sure, but that doesn’t mean everybody should do it all the time.
Same for acne, that’s a case where it makes sense to use some products because your skin is clearly failing to maintain itself, but again that doesn’t mean you should do the same thing if you don’t have such issues.