There was enough (understandable) panic in the country as it was without the President making it worse.
Further, I don’t recall “those 7 minutes” in the classroom ever being an issue before the Michael Moore-on film of June 2004.
I believe I followed news and commentary regarding 9/11 more closely than at least 99.9% of the population, and I along with millions had no awareness that there could be an issue about “Bush in the classroom” until Moore’s propaganda film made it one.
In any case, no matter how or when this topic came up, my reasons for regarding it as a spurious issue have been detailed on the thread.