Trading is gambling. But it isn’t stupid, blind gambling. It’s calculated gambling, which means that those who succeed do so with probability on their side.
The stock market is the easiest market to trade simply because unlike other markets, the stock market has a 1 directional bias (i.e. goes up more often than it goes down).
This means that trading forex and commodities is harder than trading the stock market. Here’s the data to prove it.
Trading and investing is hard enough already. Why would you want to trade a market where the random probability is 50-50 like forex or commodities?
Let’s put it this way. If you knew nothing at all and just traded on the long side in the stock market, you would come out ahead in the long term. Or as Warren Buffett says, “even a monkey throwing darts at a list of stocks can make money”. The same cannot be said about a monkey throwing darts at a list of currencies or commodities.
If you trade stocks and learned about fundamentals+technicals, you would do even better (see trading models).