While much of that has to do with a car-centric American culture, there are real growing pains as cycling ramps up. Pedestrians already on the watch for cars now have to look out for bicyclists — not all of whom follow traffic laws. E-bikes present a particular challenge. Because they go faster and have more mass, they’re more dangerous both for cyclists themselves and for pedestrians in their way — especially illegal, fast e-bikes that are more moped than bicycle.
I have noted this when I visited Copenhagen last year: Cyclists are so much more relaxed and careful than they are in Germany. Especially, they go significantly slower, so that children or old people do not end up in an uncomfortable position. In contrast, in Germany, when I do in summer my commute along the river, there is no space and still people seem to train on road bikes at full speed on lanes that are no more than 70 centimeters wide. I think this is a cultural thing - some people swap the car with a bike, but then continue biking like they have been driving.
To put it in a short phrase: We not only need to get rid of cars, but also of car culture.