Inattention to children and traumatic brain injury kill. My aunt a”h was 3 years old when she climbed on the back of an ice cream truck and fell off when it started to move. My 6-year-old aunt was supposed to be watching her because my grandmother was with her 1-year-old and newborn (my mother). How much worse is the potential for injury when a child is moving fast on a bicycle.
In other words, you’re not crazy.