In gambling, odds don't represent the true probability, so it is not just validation but also represents the ratio between the amounts staked by punters and the payout that will be received based on the probability made by the bookmakers.
With this, it will not fully provide us the chance that we are going to win or lose but will be a catalyst for us to decide, odds are there for our advantage in decision making, if the odds are good, then we can somehow trust the game. But what if there's no available information regarding the odds? This means that we, on ourselves should decide which is quite risky, believe it or not, a small portion of our betting decision is based on odds.
So in other words, with the odds the punters will know how much money will be won when the bet wins, or simply put if their bet wins, they will get less money when betting on the favorite, and they will get more money when betting on the underdog. And one thing is certain, no matter what the outcome will be bookies will always win, because the odds are made by them and will always provide benefits to them, so whatever the odds are the payouts to the bettor who wins will always be less than they should have received.
This is quite true, if they are dictating the odds, they can somehow predict the bets of the players which gives them the advantage in getting a higher profit. Going back, odds are always along with a statistical usage, if we are just going to based on the odds, we know that every bet we did has a basis and gambling gives an edge to those who are good in statistics and probability.