To play games online and win need skills and experience but gambling we don't need skills reither we only need risk! Since is very difficult to develop skills it is better we gambling and make money from the market.
We need risk and skill in gambling but as I always say, the most important thing when it comes to gambling is LUCK. Risk and skill will be useless if you are not lucky in gambling. Your'e not lucky, you lose. Your'e lucky, you win. Simple as that.
I often played online games, Mobile Legends, Dota 2, CSGO etc. and yeah you need skills there in order to win but I'm happier in playing online games compare to gambling.