Tournament Strategies
After receiving pocket cards, you are immediately faced with a choice: play your cards and either raise or call the blinds, or fold.
Practice Matters
Removing a lot of your opponent’s small pairs
Removing a lot of your opponent’s small pairs and marginal hands increases your equity with a high un-paired hand like AQo, but decreases it with a big pair. So really the argument should be that you should be 3-betting AQo more, and flatting JJ pre-flop more often. Of course poker isn't this simple. The flopability of your hand and how many streets of value you can get with a particular hand matter. Not to mention that 3-betting decreases your effective stack to pot ratio so that you can comfortably play a slightly bigger pot with a big pair, and reduces your opponent’s hands that can create big pots, like 87s.
The point here though is that certain hands
The point here though is that certain hands actually gain equity when you 3-bet them versus lose equity. But there are other things to consider besides just equity. There's fold equity, decreasing the stack to pot ratio, and initiative. All of these will factor into whether 3-betting for value or calling is better.