Pretty sure current OEMs have done this for decades for their laptops (you can find laptops that have the same CPU but wildly different battery life). They are not idiots and just slap a CPU on any laptop with random components.
The software people at laptop OEMs most definitely are idiots, and Intel's processor designs are increasingly reliant on software being smart enough to properly manage and use that hardware. Intel and Microsoft are doing a mediocre job at best of handling the software challenges, and then the OEMs ship the system with crapware that makes it impossible for the processor to stay in its low-power idle states.
And judging by how many laptop OEMs actually bothered to ship the Arc discrete GPUs, a fair number of them must also be dumb suckers.
Pretty sure current OEMs have done this for decades for their laptops (you can find laptops that have the same CPU but wildly different battery life). They are not idiots and just slap a CPU on any laptop with random components.