I think everyone has a different perspective when it comes to gambling, some people just for fun while winning is a bonus for them, and some other people just to increase the value of their money.
Actually, gambling gradually can increase winnings, but it is also important to realize that every gamble is also about luck. Therefore, you should not expect too much that your finances can be completely safe even with any method or strategy, stay wise in gambling and limit yourself and especially your finances, it should be better gambling when you can afford your money to the lost risks.
From what I see, most people who only pursue victory in gambling will usually easily fall into a slump, or even become extremely addicted, so be wise.
Let us put it this way, each one of us have different agenda when we play. But more than likely, most people are here for the mere reason of earning something. This is like getting some money at a shorter period of time. However, most will end up losing all that bankroll especially for those who don't know how to handle their finances once they are in front of their games.
Though I don't believe that gambling can gradually increase your winnings as per your statement above, I can agree that one should be wise or smart when he's in front of his games. Otherwise, it is so easy to be addicted in this game and going down in that rabbit hole is not a challenge.