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That would be a good first approximation if the pressure throughout the tire were uniform. However, it takes time for the pressure spike from the curb/pothole impact to reach the far side of the tire. Locally, the pressure could be quite high. Suppose I could tell you it's >200 psi for 0.05s. Is that enough to burst a tire or unseat the tire from the rim? Dunno, but as an engineer, I would recommend you close your eyes and ignore the pressure vs. time vs. position question, and pay attention only to the outcome. i.e. instead ask "To what cold PSI can I inflate a tire and still hit a pothole at 75mph without tire failure?"
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