So does a good gambler. Plenty of them are world class experts in the areas they gamble. It's not all one armed bandits. Deep knowledge can put you ahead of others. I regard trading as the same as gambling. A decent proponent of either tries to apply some knowledge to their moves and manages risk but it's all still totally up in the air.
Kudos to OP for admitting it's not for them. More people would be more happy if they could admit the same to themselves. For many newcomers it's the first thing they dive straight into whereas it should be the absolute last thing they attempt.