Although it is true that you learn this after a while, the first few times you bet you are just looking for luck without really understanding what it is all about and many people, especially newbies, think they can get rich betting.
They can and some people do but the odds aren't in your favor and the chances are small that you will be that person that wins the jackpot. It's like playing the lottery. You don't put all your hopes that your ticket will win, but it's still theoretically possible. In Europe we have the Eurojackpot that goes up to over €100 million at times. Buying a ticket and then getting stressed out and sad that your lucky numbers weren't picked shows a lack of common sense and logic.