to me i think yes it can be profitable but not for the most of the people. as majority of people are loosing money in gambling but still the there are some people who have good luck and they can make good money in gambling even in long term.
If you are sports fan and if you are really lucky and if you are following the team news really carefully then sports betting can be profitable in the long run.You must have certain qualities in order to win in the long run,learn to manage your bank roll and never rage bet and all who wins in the long term has these qualities or sure you will be broke if you still keep on gambling.