Mandy West was rightfully disqualified from the Louisiana Marathon. She had no right to break the rules just because she was “trying to qualify for the Olympic trials.”
It is similar to a situation of bringing notes into the SAT or ACT. Just because you are trying to get into a good school doesn’t change the fact that you cheated. West was warned multiple times by lead bikers that her actions were against the rules. She clearly ignored their advice and repeatedly took the bottle from her friend.
Regardless of what was actually in the bottle, her actions broke the rules and might have given her an unfair advantage over the other athletes. The right decision was to disqualify her.