With the average commute to work in the US being 16 mi one way, The average speed of riding a bicycle in the city being 15 mph, that makes the average commute to work just over an hour long (over 2x the 27 minutes it takes in a car). If you work in a job that requires you to be presentable, then you need to add another 15 minutes to take a quick shower and change (if your workplace even has such facilities).
Obviously, this changes with e-bikes, but there’s not really a practical difference between most modern e-bikes and an electric moped.
Even the generous estimates only put us at about 1°c increase by human activity. While the large scale effects of this are causing problems, it doesn’t really change the fact that there are plenty of 100°F days even discounting that increase.