[usea]

If the only thing stopping them from decrypting your messages is instructions to their own employees to not allow it to be done, that is not a defense against providing access to law enforcement. They can just change those instructions at any time without anybody knowing. Just like they can just change the server software to allow it.

[jiiam]

I mean at this point they could also change the code running on the user devices, probably someone would notice but that's another story.

The point is: even if they could, should they do so when compelled by authority?