You have every right to think this way, few days ago I read a story about a gambler that walked into a gambling center and ended up having a lot of luck, but after having several wins he continued gambling till he lost everything. While he was winning he benevolent enough to share some of his wins with other gamblers but when he started losing nobody was there to help him get back on his feet. You can't please Everyone
Of course there will be no body to bail him out, he thinks everyone is like him? And perhaps did those people asked him to give them money from his win? The fact that some random gambler at the casino gets over excited because of their huge win and they decided to give me some money as gift does mean that if I win a huge amount too I must return same favour, it's doesn't. I might win huge am leave the casino immediately without telling or showing the signs of winning, perhaps if that's not the first time you are winning such huge amount, there's nothing special to get too crazy about it.