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.
So indeed, if he was not CEO, likely whoever would have been would be given the same information as Jensen that lead to him saying yes on tensor cores. And in all likelihood, the same exact decision would have been made, or at least a coinflips odds chance if it really were a matter of "yes" or "no" with no clear winner.
Many, especially the "non-founder" CEOs, are risk-averse.
There's likely many CUDA-like ideas from internal engineers shot-down or ignored by leadership at companies like Microsoft, Google, etc.
While Tim Cook certainly drove the valuation of Apple up during his tenure, one of the most common criticisms was that Apple stopped innovating and more recently their quality bar has been dropping.