That's a terrible idea. Because when the day comes that a security researcher finds the flaw (and they will find the flaw) Apple has to admit that they lied to

That's a terrible idea. Because when the day comes that a security researcher finds the flaw (and they will find the flaw) Apple has to admit that they lied to their customers. And that's a very bad business practice. The enhanced encryption is Apple's way of saying that it's not their problem if LE has a beef with you. It removes Apple from the equation. If LE starts knocking at their they can say that there is nothing they can do. It reduces warrant less spying, and removes some of the ease with which LE agencies have been able to operate. LEA agencies can collect data with broad strokes anymore, they'll need warrants (which they should have needed in the first place and they will have to conduct targeted investigations now (which is what they should have been doing all along).