I feel like it's worth repeating that he gets credit for the decisions he has made, while it's also true that someone else would also see this demand, maybe earlier maybe later, and that the economy and shareholders would benefit. The point I'm making, and I think the one you're responding to, is that he didnt do something so magical that wouldn't have been done otherwise. It's a counterpoint to "this guy did so much, we would be nothing without him" and using that as a way to excuse his bad decisions.
Again, credit for putting yourself in the position to capitalize. Credit for executing. But it's pretty likely that the world would not be substantially different if Nvidia has been another company and Jensen was some guy working at MS.
I think the Tensor decision was very impactful to both the direction of AI tech and Nvidia as a company, though. I can't judge how much of the decision to invest in that technology was his but assuming he had a significant proportion of influence in that decision, he deserves a significant portion of the credit. A different person in the same position might not have seen the potential of machine learning at scale and not been willing to point their GPUs at the problem.
They basically invested in pickaxes a decade before the gold rush, and people only found out about the gold because pickaxes were pretty convenient