Walking, biking, taking the bus, carpooling are incredibly convenient for anyone willing to try, and I certainly support efforts to improve the facilities for these at all opportunities.
There are uncomfortable truths that need to be addressed about cars, however, and you don't get anywhere by avoiding it. Imagine if there were an easily preventable disease causing ~40000 deaths every year that would actually save us money to solve and help the climate situation as well. Would you ask to temper the rhetoric?
I still drive because biking is A. pretty physically grueling in a number of common weather conditions ( greater than 100 degree or less than 32 degree temps for much of the year, carrying my bike up 2-3 flights of stairs... ) B. Going to take 2-3x the time per day, before time spent showering on each end of an hour-long ride in brutal heat... Public transit is a 1+ mile walk/ride on either end of it (same problems as above), means I can only get in/out of work at specific times, and still takes 2-3x longer than driving.
That's before we get into the 2000 serious injury-causing accidents that people get in on bikes per year in my state, many of which are in my county. I really hate cars, but I'm mostly driving slow and on low-speed roads. I'm very unlikely to die or be seriously injured. That's not something I can rely on on a bike commute.
I'm looking to move closer to the office so I can mitigate some of these because I earnestly hate driving this much, but I wouldn't claim that that's going to make biking/walking "incredibly convenient", just acceptably less inconvenient.
Tempering the rhetoric in place of actually presenting facts and ideas in a non combative way that offers something of actual tangible value to people will vastly do more to accomplish the goals then trying to shame or beat down ppl.
Look, you need to say that we can prevent these deaths. You really do. But don't say it the way you did. You don't get buy-in that way.
And that's even assuming that it would be allowed on public transportation.
It would be good to hear some kind of solution, rather than just being swept under the rug. Or pushed under the bus, so to speak.
It's a way to make you look like an out-of-touch loony, who therefore gets ignored. If you want to reduce car use in the US, dial down the rhetoric, and work on increasing the convenience of not using a car. You're going to win more hearts and minds by making available something better than you are by constantly carping about the existing situation.