How on earth could a strangely thin piece of thread be so weak?

[Dark Jaguar]

You already said all that GR. Once again, it's all irrelevant. There's a problem, and finding out who's at fault won't fix it.

To reiterate: Nintendo doesn't "owe" it to them, but it still is in their best interest to provide a stronger strap. It will make them MORE MONEY and it'll also help prevent these incidents. That's the bottom line. I'm not talking about fault, I don't care about that. I'm saying I see a quick and clear solution to the problem they can take. Fault is irrelevant. And lastly, YOU don't have to be the one to break it. Your family might.

I already said that I'm not playing wildly. I know that's a major part of the problem, but why wouldn't they just go ahead and make a stronger strap?

Instead of going over the old ground, points which I've gone over as either straw men or not clearly thought out, try talking about MY points. Would releasing a new strap prevent or not prevent the problem? Would releasing a new strap benefit or not benefit Nintendo? What's the point of talking about who's to blame? If you think about this in terms of what actually will solve the problem instead of just finding out who's at fault, the solution becomes clear. Nintendo is not "morally obligated" to do anything. I'm merely arguing that if they did, it would solve the problem.