Because it's quite extreme view.

Apps should protect users and police should seek to end crime. Only when these two needs cross we get something fair. If one side gives in we all lose.

Offering lawful access to widely deployed encryption is hardly an extreme view. Our IC and their partners, as well as our bureaucrats, are mostly in agreement.

An extreme view might entail banning certain forms of math on the internet entirely, rather than simply regulating the widely deployed frictionless math.

Encryption cannot and will not ever be stopped due to it being math.

Oh, and make sure to use steganography when appropriate.

Legally mandating government wiretaps in every major method of online communication, subjecting every citizen to having their private life potentially scrutinized with no trial, is fairly extreme, yes.

If I understand right, in this example FB would hold the keys to recover the cleartext and turn it over to law enforcement only when compelled to do so with a warrant.

This isn’t extreme at all.

Forgot to add: I don’t trust the consumer devices including a fully patched brand new iPhone. I am far more concerned about the various private interests abusing data access, data brokers, hackers potentially getting into my endpoint directly or to any of my consumer cloud assets, than I am about lawful access to recoverable encryption

This. I'm also more concerned of private parties gettingy info than the gov. Gov is going to get whatever they want one way or another, but private parties getting my info is far worse.