Cargo e-bikes are dangerous for children. Urban infrastructure is not pristine and contains risks even without cars. In Estonia for instance they don't salt the streets in winter. In Paris you have random public works stuff that were forgotten on the road. You can have potholes. Etc etc.

I don't see how a children wouldn't be injured while sitting in the front of a cargo bike, protected only by a thin slice of wood. Please show me a crash test.