The target demo of those buying licenses wouldn’t be building workstations, they are buying prebuilt whatever and upgrading the entitlements from there.

MS very explicitly doesn’t target these releases to consumers, it’s entirely possible to do it by adding the 4 x useless products to get over the 5 x volume requirement. It’s sad, but not shocking they didn’t cover the edge case of a custom builder. If you were a firm building machines, you’d again get a special setup and do provisioning and key burning into bios etc.