You aren't 'wearing' the baby, you are carrying it. It's a sensible and practical way to get from a-b, or to keep the baby quiet/out of trouble while you are relaxing doing housework.
It is not a way of life, or even really a parenting choice, at least it shouldn't be, and if it is, you are overthinking things.
The reason that women in developing countries 'wear' their babies more is that they are far busier than we tend to be, housework takes longer when you don't have mod cons and safety measures like stairgates are not available also they don't get cebeebies
I think there are too many parents who take a method of doing something and turn it into a 'position', when it really isn't.