Regardless if you playing for fun, or playing for the profits, if you play beyond the normal level you are expected to play, and you get so involved, you can become addicted, same ways if you win or you lose in gambling you can still be addicted.
What matters is how you gambling, and not or what you get from gambling, whatever you do too much is already addictions, when it becomes uncontrollably done multiple times
Too much of anything is bad. Gambling is either you make profits or loss. That doesn't mean that you should overdo it. Accept whatever is the outcome of your bet and gamble moderately to stay healthy and free from addiction. If because you are winning and you continue gambling, you might become addicted.
On the other hand, if you are losing and continue chasing your losses, you will become addicted if you don't caution yourself. Self control and discipline is only what a gambler needs to avoid excessive losses and prevent addiction because gambling is a game of luck and done for fun not the other way round.