I know the points with regards to the brakes and the components. I even get the point that hydraulic would have better stopping power. I further get the point

I know the points with regards to the brakes and the components. I even get the point that hydraulic would have better stopping power. I further get the point that you need regular maintenance on these bikes more than you do on the old beater bikes most kids used to use. (Indeed, my road bike is mechanical disk brakes. And we own some of these RAD bikes.) None of that really enters here, though? The "wheel could have come off due to design" is irrelevant in a case where the wheel didn't come off. That it didn't have enough stopping power could be relevant? But even that wasn't asserted here, instead it was that the operator lost control and they crashed. Which sucks in every sense of the word. Your gripe that they use cheap components would matter if you can show that this crash was a component failure. That isn't claimed. This entire comments section is too filled with people grinding their axe to the tune of a dead kid excusing any logic to their claim.