Well, if you are not gonna use Nvidia’s extra stuff, buy an AMD, by all means.
But what you say is disingenuous. “AI and other software” is not entirely unrelated to gaming. Things like hairworks, physx, and most gameworks in general run on CUDA. And for AI (which I don’t care about that much) there is DLSS, and they are working on AI enhanced rendering.
Most games don’t use those technologies, but some do, and you will miss out on those.