A lot of people play very static, robotic poker. They've set their ranges. They've set their bet sizes. They've set their minimum outs to proceed.
If you could see every hand, you could then use that to predict future behaviour.
This is because without seeing your actual hole cards, the only information thay have is how you bet from that position with that board run-out.
Generally, we don't show all our hands because that would make us easy to beat.
So why should we show any hands at all?
So what are you trying to achieve when you show?
If you are showing after everyone has folded, and you show strength. Well, I guess you're trying to demonstrate that everyone folding was a good thing. And that they should fear your bets. This is only helpful to you if you are also bluffing with frequency. If you are a straight up NIT or TAG, and you show you'd have won it...and you do not bluff...you have just reduced the likelihood of someone calling you to the river, thereby limiting your earned value.
So showing strength is only useful when it is to be follwoed by bluffs. except NOW, you've just gone and told him you're going to bluff...or at least has put them on the lookout for it.
And if you were bluffing and showed, what you achieve is typically annoying someone, possibly putting them on tilt.
If this is your goal, well. OK. I don't like it. But at least it is a strategy.
If you're not, all you've done is taken a person who thought they made a good fold, and slapped them telling them they're so stupid, they're throwing chips away.
So what is the impact on their behaviour. They are going to be watching out for you. Theyre also going to want revenge for being made to look silly. This is fine if you fully intend to continue playing tight as a drum...but remember...you are a bluffer. So much a bluffer that you SHOW poeple you are.
That just means everyone has you labelled as a danger which must be stopped.
So what you find is people playing coy around you. They are looking for the hands to three-bet your ass. They are going to put pressure on you.
I guess, what I'm trying to say, is that the best thing to be, at the poker table, is generally invisible, relatively respectful, and minimising the amount of info you give away. You need to change it up, now and again so that patterns do not emerge when another analyses your gameplay.
Showing your cards does the opposite. It puts you in people's sights. It removes your invisibility. Revealing the bluff is semi-disrespectful. And as we said, it gives away information that your opponent did not have to pay for.
The goal is to manipulate behaviour. You want to make your opponent uncomfortable with their decisions. So you have to be able to mix it up for these strateegies to have a positive effect. But in general, I think the attention it draws is bad news.
However, one of the benefits of living by your own code is that you can break it when you choose to. If I have a spectacular hand like four of a kind or a straight flush, and my opponent folds, I will show them because people enjoy seeing 
