"...I do not see that adults are teaching kids to be safe like they used to..."

Most kids I have talked to about riding their bikes against the flow of traffic, instead of with it as required by CA law, said that is what their parents told them to do. Most kid on bike crashes I worked involved a car making a right turn at an intersection, or when entering a highway from private property. Driver looked left for oncoming traffic, didn't see the kid riding up from the right, kid t-bones car in the right side. Most kids wear helmets as required in CA, few fasten the chin strap.

Re bikes and adults, I rarely see an adult on a bike stop for a stop sign, they just pedal right on thru, sometimes at pretty high speed. When questioned, they always respond "but I'm on a bike!"...