How often do collisions with pedestrians occur at 50 km/h? If the pedestrian doesn't literally jump in front of the car from an somewhere he's visually obscured, there's usually time to stomp on the brakes. I've done it multiple times with cyclists riding in the wrong direction on the bicycle lane, over crosswalks where they should be dismounting, or just plain "jaycycling".
We clearly have different views on what's quiet and what's not. If I'm on my terrace I can hear cars when they drive past, but not inside my home and it being a 30 zone it doesn't bother me. Were you forced to live next to seven lanes of traffic, where I assume the limit is much higher than 30-50 km/h?
I don't have much to say about tire particles and whatnot. Are you just as much against microplastics in food and cosmetics?
If you've never gotten a license, it surprises me you're so against something you've never tried. I tried cycling for about a year and a half. I learned I don't like sweating profusely in summer, getting rained on in spring or fall, or riding on snow in winter. I can drive to work and drop my child off at kindergarten in 15 minutes, with a bicycle and a trailer it would take me more than 45 if the weather is good. I don't need to hurry home after grocery shopping and I only need to shop once every week or two, as opposed to two to three times a week if I'm limited to what I can fit into a backpack, and I don't need to drink tap water since I can fit a few crates of mineral water in my trunk. The risk of getting my car stolen is lower than my bicycle getting stolen, which has happened in the past. You're absolutely right, it's not rocket science. Foe me the choice is clear.
I still don't know what you mean by trips per hour.