While gambling is considered bad by most of the community trading is considered neutral.
Who says gambling is bad ? They are wrong . they only think its bad because they cant win on it .gambling also gains a bad reputation because others are doing illegal form of gambling .
Nothing's bad in gambling if you know how to deal with it, controlling your self and emotion is the best option that you can avoid that.
I think OP was right they have similarity the poker and the trading and probably also all feature gambling too, but I guess the more worst risk is gambling though it is not too much need TA when you are playing, unlike trading you need to have dip research.