Of course, theoretical lessons are one thing and practical experiences are another, although theoretical lessons are useful and important, practical experience is necessary to gain the necessary experience. Theoretically, for example, anyone can learn to drive a car,  but practically, in reality, not everyone is able to drive a car within the city and crowded places.

Trading is the same thing. Theoretically, everyone thinks they can trade because it is very easy. It is simply buying at a low price and selling at a high price, but when they start practical trading and start making mistakes and losing, they realize how wrong they were and how much they need practical experiences.