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.
There is no substitute for theoretical knowledge and practical experience to learn any subject. Especially theoretical knowledge is incomplete without practical experience. I think theoretical knowledge is only one third of skill in skill acquisition. Then you need to complement the knowledge through practical experience.
If someone wants to claim to be a trader after learning basic trades, then I can call him nothing but a fool. Trading is very easy to learn but when you practice it you realize how difficult trading is. If you trade with two days of experience, you will lose many times more than you will gain. So it is better not to trade with cash without completing the knowledge.