What....? Think you've got it backwards there.
Those who need more than 4 cores are typically: Game devs / Photographers / Programmers / Software devs / Streamers (can be considered a profession now honestly) / Gamers (depending on how much they want to "future" proof themselves and intended gaming and other workloads).
That is just to name the ones I can think of at the moment. All of the professions above "should" be using a 6 core or higher CPU if they want to get the most of their workload done in the fastest way and they will almost all be using a dedicated GPU simply due to the sheer volume of items they are manipulating or modifying.
Whereas business people (like marketing / accounting / etc) typically are just fine with a strong 4 core CPU with the built in iGPU. They don't have any workloads that require the grunt dedicated GPUs offer.