Lol, Matt Brown didn't keep it very well either. If you'll remember, he got his back taken, put into a body triangle and almost submitted.
And you also have to consider offense vs defense. It's a lot easier to defend. When people ask "why didn't Silva just spam body kicks?" they don't realize he was trying to land more shots, Brown was wise to it and countering it. Multiple times I saw brown move or come over the top with a left. When you have taken a ton of punishment and the other guy is making you pay for everything you throw, you get gunshy. And every time he started to formulate a plan or work something, Matt punched it out of his head.
I'm not saying this to come off as a tough guy or anything, but it's immediately clear that you guys haven't trained or competed when you say things like that.