Because it means that the customer then gets better products in future at less cost.
Part of the message why the codecs were removed was because they were expensive. They are removed, the Windows pricing is the same. The customer got shafted.
Or the inherent cost of making Windows has gone up, and that removing expensive components has meant that Microsoft didn't have to pass that cost onto consumers.
Or maybe the reduction in price allowed Microsoft to subsidize Windows to $40 for six months for millions of customers.
Money is a zero-sum asset. If Microsoft makes Windows more expensive by bundling expensive components, at the end of the day it's the customers who are going to have to pay for it.