If the rules state that no friendship bracelets are allowed and the penalty is indeed forfeiture of victory... then what’s the problem?
The coach in question is a giant bag of douche. That’s the problem. Probably works at the DMV in his spare time or is a spleling nazi on boards.
It just seems petty. She didn’t break the spirit of the rule and it certainly would not have given her an advantage.
On the other hand, violating the spirit of the rule and persecuting another for your own avarice of sorts, seems petty, venal, and small.
You won because your coach had another disqualified for wearing a friendship bracelet? That must be some real victory, pyrrhic, but a victory.
Rules are rules;
Can’t actually say you beat anyone, by besting them.