Gambling is a big different from trading where we can share and take used of the same strategies but in gambling, it seems to be not applicable. Gambling is somewhat a big competition where everyone wants to win and so keeping our own strategies is a tool to make big days over the others..
What game you are talking? There's not much of a competition in gambling if you play like sports betting, dice, and other forms of games where there's a house who will accept your bet. Moreover, sports betting is something that I can agreed about sharing strategies because there is no house edge and gamblers has a better chance to win compared to games like dice and the like.
Oftentimes, gambling is taken too generalized when in fact it is too broad to lump as one. Gambling refers to so many games that may not even share any single quality except that you are betting on it for the win.
There are gambling games in which you play against other gamblers such as poker. In this sense, you will not share strategies as the others are basically your opponent. There are gambling games that are played against no one but the house. Dice is mentioned. In this game, there is no problem sharing a strategy. Well, if any will actually work.