Except in the case with the Pentium special edition 2 cores and i3 parts, Intel actually designed a separate two core part that wouldn't have the benefit of re-enabling cores among hobbyists.
And then there's the artificial segmentation by disabling Xeon support among consumer boards... even though the Xeon branded parts were identical to i7s (with the GPU disabled) and adding (or removing) a pin on a socket between generations even though the chipset supports the CPU itself (and the CPU runs on the socket fine with an adapter.)
Intel definitely did everything they could to make it as confusing as possible.