Thank you all for the responses. You saved me much grief!
The person who is giving advice was a prominent AO at an Ivy. Not just AO but very high up the chain. Also published a popular book on admissions!
It just made no sense to me and child who is very much an out and out math kid, attended the camp for 2 years, made a huge impact. That is pretty much the highlight for the child the last two summers and to not list that seemed bizarre.
Not going to use this AO.