I could guess, everyone know that gambling is a way to give us entertainment. But instead of it, most of the people play gambling, for making money, and they think it is a source of gain money in a short cut. So in this way, you are right, everyone have their own thinking about gambling.
Those people that thinks about gambling as an entertainment are the ones hiding their main goal why they are gambling. I know there are some that have that reason why they gamble. But the definition of gambling that comes to the mind of majority is all about, money, greediness, profit and everything that is about finances.
Only rich people say gambling is for entertainment because they don't care about their money, they only care about the feeling of making a bet/entertainment.. For me, gambling is a game that needs fortune and a game that can make you rich easily and poor easily. Once you get into gambling, it will hard to escape.