I’m not going to comment on the parenting decisions because we really don’t know anything about the situation.
I do, however, really wish that our c-train system did not have so many at-grade crossings. It’s just so dangerous. The c-trains hit and kill adults in accidents every year (not just suicides, but distracted walking too), so it’s just that much more dangerous for little kids. Really feel awful for everyone impacted by this incident today.