We always hope for wins as we all don't want to loose but that's against the market rule of gambling as they are win/loss are two sides of same coins and can't be avoided.But yes if you have some experience in gambling it will really help you to balance your gameplay in much effective manner than new player.Slots have their own taste and sports lover really find it attractive to place bets on their favourite sports with having knowledge of the team members skills.
Experienced gamblers do lose less and do end up winning more, doesn't mean that they have to be in profit, but they are doing better in percentage. So, if you are a newbie and get in with 100 dollars, you will probably lose all of that 100 dollars in a week at most, if you are not careful that is.
If you are experienced and get in with 10k, you will still lose 100 dollars in a week, but you just lost a lot less of your total amount. That difference is a lot, because in one of them you are doing something that will bankrupt you in a week, while the other would take years to get your completely out without having any money left in the casino.