If it is that simple to create products more people can do it => cheaper the products.
A market driven by cheaper products that can also produce them easily is going into a price reduction loop until it reaches zero.
Thus I think something else wil happen with AI. Because what I described and what you describe is destroying the flow of capital which is the base of the economy.
Not sure what will happen. My bet (unfortunately) is on a really big mega corp that produces an AI that we all use.
