Eh, even when asked specifically to show it's work GPT-4 still frequently makes calculation errors. It's just one of the limitations of current LLMs, and can easily be solved by integration with Wolfram, or even just a basic calculator.
The reason Ontario (and Canada in general) is doing well is because they have a much higher vaccination rate and a healthier population in general. In the US, the high numbers of hospitalization and death are overwhelmingly unvaccinated and/or extremely unhealthy individuals. Also, comparing absolute numbers is disingenuous when the vaccination rate is so high.
The person you linked (Sam Harris) is actually one of the leading voices advocating for spirituality without religion. He wrote about it in his book Waking Up: A Guide to Spirituality Without Religion.