1) Technically? You make it sound as if it was some sort of judgement call. He clearly went for the neck, rolled, and held him by applying pressure to the neck. AND he got caught. Again, how is that not a yellow card?
2) Why do you need to bring pocock's incident? No ofense, but that's the equivalent of saying to the judge "Your honour, technically, i killed the guy, but there is this other guy who killed more". It sounds as if you are trying to change the subject by bring up something that is not relevant to this particular incident.
Having said that, since you brought it up, Pocock received a 3 week suspension. Had he been caught, he would have been yellow carded. The highlanders' player was caught, TMO was consulted, and not even a yellow card was given. That double standard is a problem.
I am going to try to give you a word of advice without trying to be condescending. Hope you don't take it the wrong way. When you post stuff like this, you lose credibility.