That is not to be blamed on the cops. Let's try to be truthful.
Both sides are to be blamed, only one side are professional adults who are trained protect our community. A pursue is always dangerous, not only for the suspect but also for the cops and bystanders so it should not be done if not absolutely necessary.
Setting aside the question who is to be blamed, using motorcycles to pursue kids on bikes will cause the deaths of more kids. Is that a price worth paying? No.
This reaction is interesting to me. In many jurisdictions around the world, police are required to call off a chase if it is deemed unsafe for any reason.
In what world do you think it is OK for a 12-year-old boy riding an e-scooter to die after being chased by police? Before you respond: Ask yourself how you would react if it was your son (or close relative). Any parent would devasted.