> are required to give law enforcement enough access in order to track down people who do crimes over the telephone.

They are not; however, required to prevent certain people on a prescribed government list or criteria from owning or using a telephone or from dialing certain numbers.

> won't help law enforcement

So it's not because a "channel is against the law."

"Probably" doesn't cut it. If law enforcement doesn't observe it (as would likely be the case on an E2EE-by-default platform), then there's nothing actionable they can do.

If they do observe it, and the platform owners are responsive to taking down illegal content and/or providing information on the participants, then likely law enforcement is satisfied with that.

Internet is so full of it. And also financial scam. When do they restrict it? /S