He's answering the question "How should options be priced?"
Sure, it's possible for a big crash in Nvidia just due to volatility. But in that case, the market as a whole would likely be affected.
Whether Nvidia specifically takes a big dive depends much more on whether they continue to meet growth estimates than general volatility. If they miss earnings estimates in a meaningful way the market is going to take the stock behind the shed and shoot it. If they continue to exceed estimates the stock will probably go up or at least keep its present valuation.