Trading - earn money in long run
Gambling - lose money in long run.
I don't know how someone can say it's the same thing.
I know why they are saying that trading and gambling is the same thing. The idea of trading is the same with gambling but in trading it's more professional to here that way of risking your money unlike in gambling, it's like no formal way of risking your money. People thinks that you are wagering your money in gambling and in trading not.