Exactly sharing your wins is base on ones choice , is not a much . Sometimes one can win certain amount of money and he or she would be overwhelmed with joy , and with that they can just easily share out some portions of those wins . Especially when the win is pretty huge .
There are some winnings that come with the joy of sharing; there are also some that come with the player just keeping everything to themselves because of how much they might have lost before that winning finally comes through for them, and that moment, even if you are aware that they just won a game, you might not get tips from them. There are some who will just willingly, with the joy of winning, share almost everything with others. It happens; it all is based on the mood the player is in and not entitlement like some close friends feel to the winning.
I agree with you, every victory is not to be shared by everyone, continuously, where we need a process to get the victory, if we have to keep it to ourselves, it means that the victory that was obtained has not been profitable and is indeed not worthy of being shared by colleagues.
For this issue, I think that sharing the winnings really depends on yourself in the sense that it depends on whether you are willing or not to give some of the winnings to others, but I am sure that most gamblers are definitely not too happy to share some of their winnings with others, especially if for example you are forced by other people, because after all, winning is the result that we always hope for even if for example we do not prioritize it too much, but in the end for this issue it really depends on your own will and other people should not force you to give some of the amount you get to them when you feel you don't want to share it for some reason.