Thanks for reply and link.
Yes, from packet sniffing in the past, I can attest to encrypted traffic all looking like gibberish. I suppose my question is more about it looking indistinguishable from regular https traffic.
I suppose at https is a protocol which can be used peer to peer or client to server, any pattern monitoring/matching for safe net traffic is going to be pretty much impossible. If they, say, only allowed encrypted traffic to specific servers, they could probably be less specific, but that leaves all sorts of data vulnerable and would surely never be desirable be legislators.
Considering we have numerous encryption protocols, all with different transmission characteristics, it would seem incredulous to think ISPs could block with precision. Even with fancy comms pattern monitoring, safe net could emulate another accredited pattern.