Take the example of a teacher, he teaches all his students the same lessons, the same attention, and the same homework, but will all of his students be successful? no, there are definitely some who fail and some who succeed, because each person has a different level of learning, luck, etc. Likewise with trading, even when someone is under the same mentor with the same trading technique, the results will be different for each trader, there may be some who succeed or fail. Because there are many factors that make someone successful in trading and not all traders can achieve this.