the question is: are they sick and thus the skin is out of whack, or are they sick because the skin is out of whack?
The amount of oil your skin produces naturally is usually connected to genes and hormone levels. It’s ok to have more oily or drier skin. It’s diversity, everyone is built differently.
no and yes to that; there are tall people and small people, but that is usually not a medical condition.
everyone is built the same. and certainly nobody is built to have life detrimental skin conditions; yes, severe gene defects exist. But if you are swaetting a lot and you stink like a skunk, there is a very good reason for it. and the reason is:
something is hindering homöostasis to work properly- and that is usually a thing you ingested but don’t need, or a thing you did not ingest, but need. plus toxin exposure.
Yes, I agree, of course there can be those kinds of patological skin conditions. Those are extremes though. Most people with oily skin are perfectly alright and are just an example of natural variation in genetics. I don’t want every person with oily skin to think there’s something wrong with them. But they ARE in greater risk of developing a skin condition if they don’t adopt hygiene appropriate for their skin type, so advises not to use soap or shampoo can be very bad for them (and good for the dry type of skin people at the same time).