According to chapter 2 of “The Wealth of Nations” by Adam Smith, the father of economics, the hypothesis posed in the question is not valid.
Even in agricultural times, men farmed and women weaved. We can say that we make our own hoe for agriculture, but the metal part of the hoe belongs to metallurgy. This means you have to mine the iron ore, smelt it, and process it yourself.
To wear clothes, you must grow your own cotton and raise silkworms, and you can make spinning machines and looms to make cloth, and you can cut and make fabrics. clothes yourself.
Essential bowls belong to pottery making; toothbrushes belong to plastic products; soap and shower gel belong to daily chemical industry. These cannot be mastered by one person.
TheThe most important thing is salt. If people do not eat salt, they will be weak and suffer from fat neck disease. You have to be able to dig salt wells to collect water and make salt.