So the question is, "Is there really no way out for gamblers to stay fit and in control?"
There is and this is dependent on how a gambler control himself. Self-control is the best way for gamblers to stay in control while not leaving their favorite gambling games. He must exercise responsible gambling and bankroll management. Set limiters both in time and in fund. If any of these limiter is reached, end the session. This will give a gambler time to divert his attention and do things that will balance out his activity.
Is gambling addiction inevitable??
Gambling addiction can be avoided, it just needs proper management gambling activities. If one feels he is getting addicted to gambling, he can always pause his gambling activity and divert his attention to somewhere else. This can help suspend the developing gambling addiction. It is much better if the gambler can determine the do's and dont's in gambling, this will increase his resistance to gambling addiction.
If winning and losing lead to addiction, how can we maintain our sanity?
Self-control is the keyword. Gamble responsibly and ask help if something is amiss.