Microsoft would quickly hear about that from end-users or the press, and pull that OEM's certification or stop selling them OEM Windows 11 licenses.

These are OEM minimums. Per the linked document Windows 11 will happily install on a machine without a camera (e.g. PCs). It is that Microsoft won't certify OEM's machines/sell them discount licenses without checking these boxes.

Agreed, and totally fair. I still think there will be a hacker here or there with an OEM build who just wants to make. it. go.