It is entirely possible that something that was done for a long time is a healthy thing just as it is entirely possible that it was a terrible thing that we conquered with knowledge and abundance. Evidence is what tells you if the thing falls into one of those categories.
I like living in a time where we are outraged if children in our community die and in cases where there was nothing that could have been done we want to do research to find something we can do in the future. That was not normal for millennia until really very recently and it seems healthy to me?
Is this actually true? I thought archaic humans had much better dental outcomes because their diets had a small fraction of the sugars that modern diets do. Could be wrong but I was definitely under the impression that poor dental health was more a function of modern diet and not something that necessarily existed throughout history.
Feel free to nit-pick that example, there are an absolute plethora of others. When did surviving appendicitis become a thing? What was the median life expectancy for a newborn baby at various times in history? Calling out the fetishism of humans in a "natural state" needs to be done. Just as there are things we can learn from our pre-historic existence. Evidence is obviously the required thing not just amusing anecdote about how we have totally "lost our way."
Certain palms are also (and have been for... Again I don't know, but I believe 'a very long time') 'milked' for a sugary sap that's drunk fresh or fermented.
Being the norm historically does not imply it is healthy or optimal, only that it is at least survivable on average.