I also have been irritated about that "play the table, not the opponent" crap. A pool hustler I knew used this to encourage his victims to do this - specifically to get them to ignore his competence.
Here is the proper general rule on making table decisions:
The table that determines the type of shot - safety, offensive, or the trickier two-way shot.
The specific shot variation that you select is based on your opponent's skills.
Put another way:
At the Strategic level, a simple decision matrix defines the shot type.
It is at the Tactical level where you select the CB/OB paths to most benefit you and impede your opponent.
I disagree. If you are playing to your opponent, you are either psyching yourself up or down. There is always one best choice for your present skill level, and that is the choice you should always make. Each and every shot should be to the best of your ability. Never dumb down your game because your opponent is weak in a certain area. Play each and every shot like you are playing for everything you have. If you don't do that, you are only spinning your wheels and will only limit how well you can eventually play.
The obvious exception to that would be if you are hustling someone. People say that if they were playing Shane, they would take the tougher shot because they don't want him to get to the table. That is wrong thinking. If you feel you will probably miss the shot, you are making yourself the favorite to miss it. So, you are selling yourself down the river. You then should play the safe. Sure, he might hit it, probably will. That doesn't mean you are worse off. That just gives you another opportunity with him only getting one shot.
When you are worried about what your opponent will do if you miss, you are playing him, and not giving yourself your best chance at what the table has to offer you.
Yes, it's all about making the right decisions. Those decisions are determined by what YOU can do, not what your opponent MIGHT do. YOU always want to stay in control of the table. If you take on a risky shot just because your opponent is a great player and pass on the so-so safe you know you can do, you have to be willing to face the inevitable. That is, you are lessening your chances of a successful outcome. You miss the shot, you don't know what will happen. Will you leave a duck, or get a lucky safe? You don't know, because you missed. But, with the so-so safe, at least you know what you will leave. It will not be an easy shot, but something he has to work at or play safe himself.
You keep playing your opponent, you are doing nothing more than giving him an edge. Sure, at times it will pay off. But, if you keep track of it, you will find that it will bite you just as often. You don't gain a thing.