This post is crazy nonsense: Bad games companies have always existed, and the solution is easy: dont buy their trash. I buy mostly smaller indie games these days just fine.
nvidia isn't purposely killing anything, they are just following the pivot into the AI nonsense. They have no choice, if they are in a unique position to make 10x by a pivot they will, even if it might be a dumpsterfire of a house of cards. Its immoral to just abandon the industry that created you, but companies have always been immoral.
Valve has an opportunity to what? Take over video card hardware market? No. AMD and Intel are already competitors in the market and cant get any foothold (until hopefully now consumers will have no choice but to shift to them)