https://ccdd.hsph.harvard.edu/will-covid-19-go-away-on-its-own-in-warmer-weather/
"The short answer is that while we may expect modest declines in the contagiousness of SARS-CoV-2 in warmer, wetter weather and perhaps with the closing of schools in temperate regions of the Northern Hemisphere, it is not reasonable to expect these declines alone to slow transmission enough to make a big dent."
This is what a Harvard epidemiologist has to say, and it mirrors everything else I've seen on the issue.
Take these two statements:
1. Virus A propagates better at lower temperatures and humidity.
2. The difference isn't likely big enough to meaningfully help in the fight against it.
Both of those statements can be true. You've correctly pointed out that the first statement is probably true as it relates to the coronavirus. You then extrapolated that "the virus is very sensitive to heat and humidity". Others have pointed out to you that your extrapolation hasn't been demonstrated yet, and that experts seem to be suggesting that statement 2, above might be true.
You're partially right, but in typical Grant fashion you'd rather argue for 5 pages than admit to the area where you're partially wrong.