In my city, it's not if but when you'll get hit by a car on a bike. Yet I see parents increasingly think it's okay to haul their children on their bikes.
But it isn't. End of story.
Happy to support people who want to make biking safer. Happy to support politicians who want to build protected bike lanes.
But you can't just make up a fairy tale land and pretend it's safe. Bring yourself back to real life, and your children are in danger.
Cars regularly mount pavements/sidewalks as well, and kill pedestrians who are not even in the road.
The correct response to "cars make cities unsafe for everyone" is of course to ban all but the most essential cars from cities. It is not to suggest that the _other_ forms of transport (including walking on the pavement/sidewalk!) are so unsafe as to be irresponsible, in the presence of cars.