Re: Controversial speculation ahead.
You could be right, and your reasoning isn't too far off.
But one argument I can see is for a long time crims haven't been trusting of coms and have acted to avoid electronics whereever possible. Not all of course, many are stupid and don't take the threats seriously (hence why I agree with your reasoning), but the better ones have always either used good encryption or had clear protocols about where and when to meet.
If all encryption was banned and all phones monitored real-time, then the crims would use 'pawns' to carry messages and set themselves up such that they can still trade pretty openly while not leaving a trace of evidence. Like in the olden days.