I don't think there is such a thing as playing ONLY for entertainment. Everyone likes to win, it is just a matter of how much is enough for you!
So you admit that you belong to the first camp
I mean, the ones who claim that everyone who is gambling is looking for profit (at the end of the day), i.e. there is always a profit-earning incentive involved even with the games of chance (what gambling is essentially all about). I for one don't think so as there are strong and valid reasons as well as reliable and confirmatory evidence to believe that it is not always the case and further from truth than many of us are inclined to assume
For example, it is a universally accepted view that due to the house edge, you are set to lose in the long run. However, there are people who have been gambling years on end with small amounts, and given that they have been losing money all this time, you wouldn't really expect them to be looking for profits as this assumption implies these individuals are irrational bordering on outright insane (unless they are looking for something else, of course)