The issue at hand can be described very, very easily: law enforcement agencies' mission is going to get harder to fulfil if they lose the possibility to wiretap suspects. The solution is, unfortunately, not that easy!
Now, HNers can cry their lungs out that mathematics forbid a perfectly safe backdoor and what not, but they are missing the point: they are simply ignoring the question and lacking any respect for the people posing it in the first place.
The issue exist; and it makes sense. Furthermore, wire-tapping has always been accepted, at least as a necessary evil, by democracies all over the world. At the same time, absolute remote privacy has never existed, much less been guaranteed. E2EE is a big game changer, and you expect people with governing responsibility to just ignore it?