choose a wise husband from a bunch of boys is a gambling
choose a school to study is a gambling
choose a boss to work with is a gambling
Choosing a spouse is not something most people do in 10 seconds or minutes, they dedicate time and energy to it.
Choosing a school - yes, it's a little bit more risky, but most parents tend to read and hear reviews and in the worse case they can always change their decision later on.
Choosing a boos is similar to school, in our era changing a job has become something extremely normal.
You can't however change your bet once you choose red in the roulette or under 215.5 in a basketball game, or choosing wrongly the losing team. In gambling once you gave away the money - poof, it's gone, you cannot consider your choices anymore, you cannot regret, you cannot undo what you did except for taking a new bet.
Yes, if you bet on over 199.5 and the game hasn't started - you can place an opposite bet if you don't like what you did, but then you would have to pay a minimum of 5% (if not 10%-20%) aka "vig" on these bets, before the game has even started.
All in all,
When you place a bet and gamble you don't improve your life.
Choosing a spouse - can improve your life.
Choosing a school - can improve your life.
Choosing a boss - can improve your life.
How's choosing RED in the Roulette going to improve your life?
How's betting on over XXX points or under going to make you a better person or pave your way in your life?
Want to treat it as a drop of adrenaline and rush? You can, but it is no different than drugs.
And I have nothing against good drugs, Cannabis can cure many types of cancer, but this is when you take it properly, not as a "joint" or anything ... and yes, it's okay not to go always by the book in life, it's okay to "have fun" (although I cannot see anything fun in gambling) - but it's definitely not going to make you a better person.