If you mean bluffing, then real poker player will not fall very often on that trick as long as there is strong base on the card statistics which they are analysing and practicing many times. I don't know what kind of strategy you are pertaining but being good on probability and statistics is the only strategy needed to win on poker. Bluffing is just an add-ons and will not gonna work against professional player.
I disagree. If it were so, poker bots would be winning all the time, because surely they "know" those things, probability and statistics, better than any human poker player.
The more I play poker, the more I realize that there's something else, maybe something that may look a bit irrational even, that is very important to win in poker. I said "may look' because in fact it's not irrational. Your actions may
look irrational to your opponents, while you do it to be unpredictable, that's all.
This. Statistics and probability? Yep, they're most likely needed, though it's more of actually memorizing the cards that are possible for you to lose against while pairing up with the cards the dealer has already placed. That's just determining your odds though, and it's not like you can always fold when your cards are bad, or heck even at the middle range good cards. Bluffing is needed to guarantee a win in those cases, since it adds what @betwrong said, unpredictability.