Exactly. Strong encryption is not rocket-science anymore. Criminals can even simply code their own encrpyted tools and in that case, law enforcement is completely out of the game (and actually, professional crime does no rely on Signal and sorts anyways).

It would be so much wiser to just keep quiet about that topic and rely on the neglicence of the common criminal - below the line there is a plethora of information in metadata and connection data, still incredibly better than anything law enforcement had 15 years ago.

The effect of any public advance into "responsible encryption" is only causing criminals to harden their tools.