“*In the case of a serious breach of Rule 1-2, the Committee may impose a penalty of disqualification.”
“Note 1: A player is deemed to have committed a serious breach of Rule 1-2 if the Committee considers that the action taken in breach of this Rule has allowed him or another player to gain a significant advantage....”
And the committee did not. its at their discretion.
the rules provided a penalty. the penalty was imposed. the committee did not decide to disqualify him.
if you are upset it seems logical to be upset at the committee.
Keep reading. It also says if the offense falls into another rule, defer to that rule.