Coin flipping has so much to do with luck and with little or no skill at all whereas in day trading you can't just open a position to trade hinging on luck there must be an applied skills from a long time built technique.
I have learnt a number of lessons from my losses in gambling but I can't say I can depend and work with the experiences of those losses to make profit in subsequent bets but for trade the more experience and knowledge you possess the more chances you have of making profitable trades without having to be lucky at it.