i am agree that both gambling and trading is need money to get money, but i don't think that doing gambling is a waste of time because from what i am do for playing gambling, i can enjoy the games even i don't make money from the games. maybe some people will considering that doing gambling is a waste of time but for the other people, they don't think like that, they only want to enjoy playing gambling in their spare time like me.
so if you think the proccess difference make both different then you can not consider both same and vice versa.