I'd say because a lot of OCers run video when there is possibility (probability?) of infringement by LEOs. As pleased as we are with the ruling, it's still a good idea to pin/password lock one's phone, and be able to remote wipe if necessary. Also, keep in mind that with sufficient effort, pretty much any online or cloud service one's device may connect to, can be subject to scrutiny. That should require the same standards, if not higher, than a search of one's device. And very likely the question of a warrant will be put to someone of higher education and knowledge than "Joe LEO".
I think you're on point with this one. Unfortunately, like many cases, it's going to take punitive suits to hammer the message home.
ie: I'm approached by Ofc Smith walking down the street, demanding ID. I rebuff him for lack of RAS, and move on. He then IDs me running my tags as I get into my car. He still has no RAS, but will violate my privacy anyway. It, like the routine running of a firearm's serial, after being seized for "Officer safety", are such common violations, that they don't even think about it.
