Religion usually prohibits things that have a bigger bad side or loss. For example, gambling can have a bad impact if you are addicted to it, which can harm many people. Then prostitution has detrimental sides such as the potential for contracting dangerous diseases.
However, from a political perspective, of course these two things can be profitable for the country because they can be taxed, which is why not a few countries legalize gambling and prostitution simply to be able to take these profits as state tax income.
For people who are not religious, I don't think there is a problem, they can do whatever they want as long as it doesn't conflict with the rules that apply where they live.
I believe that something can not destroy ones career unless the person give it a chance, so betting can't destroy ones life if tye gambler doesn't give it chance. Given gamble a chance to destroy careers is only when guy are addicted to it, and additions starts gradually gradually, at the time you know you are getting addicted to gamble you must make an amend so you won't lose everything you have. I have heard stories were gamblers says they sold their houses, cars and other furnitures and use the money to gamble thinking they will win but they ended up losing everything that they have. So it's better to gamble with what you can afford to lose
Few reasons why many religions doesn't like gamble is because they don't want people to get addicted and they know if one is addicted the person might sell his/her properties to gamble.