Secret? There's no such thing because winning will always vary on what game you are into. Probabilities will depend because pure luck based ones is different from strategic ones.
The important thing here is that you do enjoy while you are playing without making yourself fall into the pit of addiction.
Quite agree with you but, come to think of gambling as an occupation, will you think those who take gambling as their profession aren't seeing anything good about gambling? Why will they still stick to gambling in such a way? Gambling has a secret and not purely base on luck! luck!! luck!!!