Trading is a science, and therefore the more you know, the better your performance, but it is not like physics and mathematics, where one + one equals 2, but is based on unknown variables, and therefore there is a factor of luck, this factor disappears with skill, practice, and trading for a long time.

Thus, if the beginner does not learn or has sufficient knowledge, the possibility of losing is more than gaining, especially if he does not control his feelings, which is the second most important factor after learning.
So it is the product of learning, risk management and market psychology.