Things only exist if they are made. The ubiquity of this convergence then implies that those who make have similar tastes and those who have dissimilar tastes lack some fundamental capacity to construct.
I think it implies that the "convergence" is toward the lowest common denominator. That is, a design that avoids displeasing most people rather than pleasing most people.
It's a cost-savings measure. It also is, I think, a large reason why the modern world tends to lack aesthetic excellence.
