Earlier quoted context omitted.
That's not really a bike path, now is it? It's a painted lane on a road. I've never been in a place where I had to take a "busy main road" to get around locally. Cross it sometimes, sure, which can be done at a light. This sort of highlights the problem. Over-protectiveness, by examining the worst that can happen, and the worst scenario.
I've been riding in a big west coast city for the better part of two decades, and I have definitely not been able to rely on dedicated bike paths (or even multimodal "trails") to get around. I mostly ride in the road, and often in the car lane rather than a paint-separated bike lane when I judge that the latter is unsafe (can happen for various reasons but mostly conflicts with cars turning right, pulling out, etc.).…
Fair enough, but that's not what I said. I said locally, and neighbourhood. You elude to this later in your comment, but it seems unjust to reply, and refue my comment, while changing scope.
These are kids. They can bike locally to friends houses, or a corner store, or a non-central local strip mall, without hitting main roads.
Which you in fact agree with, later in your comment!
It doesn't need to be all or nothing, people. Biking in local neighbourhoods can be safe, and it can still be dicey on the main roads.