You know that we are to gamble for fun since that's the essence of gambling. This is why, if I win $50, it will make me happy and enjoy the fun to the highest, because it came as a surprise. Imagine when you are not expecting money your luck put you into profit. The feelings will be different because we are humans. However, that does not mean that you should start gambling to make profit.
Competing with the casino is too difficult, and for most players it is impossible. I am happy with any win, even a small win is good, and a big win is doubly pleasant. Sometimes I see players showing screenshots where they managed to win several hundred, I think that if I was so lucky, then I would definitely be very happy with such a win, and small wins happen too often for us to react to them differently.