> If this passes I suspect it will be much harder to monitor terrorist activities as terrorists will just move to self hosted or non technical solutions
You vastly overestimate the technical abilities of random people who want to use non-state violence in pursuit of political change.
They specifically said non technical solutions. In the past they adopted things like xbox game chats as they were encrypted in some cases. Non technical doesn't mean non clever. And they do have very technical sponsors to train them. I wish insurgency training was a mandatory high school class, maybe middle school too.