School is not important as 96% of what you learn won't be used in the real world to make money, but this 4% left is making a lot of people rich, math and gambling seems to go with each other, what do you guys think? Am I wrong or right?
It depends!
In some games math won't help you at all, but in others like dice or cards they will help you a lot if you're good at math.
The idea behind this advantage consists of forming a set with all possible outcomes in a game and, from this set, quantifying the results that are favorable or not in a given outcome.
When the player has all the necessary information and is able to measure this outcome of probabilities, it is possible to check the proportion between favorable or unfavorable results and compare them with other game objectives to make the best bet, bluff or know if the opponent is bluffing, and in some cases even knows exactly what is the only possible outcome of a game that apparently has not yet been revealed.
If you are interested in this, I advise you to study Pascal's triangle... it is very useful when we want to know the number of ways in which we can select a number of elements from a set that has an equal or greater amount of elements. Before using mathematics to play, you need to know this important mathematical tool.
How does math help you with dice games? I am not very well versed in dice games, but are you talking about the simple versions that ask you to pick high or low and stuff like that?
I agree with you that certain mathematical basics and statistics specifically can help you with making decisions in some games. Poker is one of those examples. But since there are so many resources now that everyone can access for free, I think multiplayer games rarely give you an edge in most of the games because most of the people are aware of most of the important rules/mathematical laws.