I'm a beginner in English. I'm using a translation
App. Please let me know if I make any mistakes in my English.
It's 100% skill.
However, there are some prerequisites.
First, you need to ensure a sufficient number of trials for variance to converge.
Because of this, luck tends to play a significant role in tournaments and similar settings.
Also, the difference in skill between yourself and your opponent matters—a stronger player will gain more the longer they continue.
For example, in a match between two advanced players of equal skill, the result is determined by luck, much like a coin toss.
However, between an advanced and an intermediate player, the longer the match goes on, the more the advanced player will benefit.
From the intermediate player's perspective, it's best to lock in their gains as soon as they experience a favorable streak.
Even if you're not as strong as a top-level player, you can keep winning by targeting opponents weaker than yourself.