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In both cases, the player stops competing for victory. That's the analogy.
Kostya, in that case, the player violated the rules in one playthrough, and it was annulled. Moreover, he violated the rules. Here, Alex behaved incorrectly in one match, and he was removed from the entire tournament. It's not a complete match, don't you think? Moreover, he didn't formally violate any rules.
By the way, what about your words after the vote, that the best option would have been a technical win in one match? ;)