Its tough to say!
If its a good pro shop and those guys are trust worthy. I would agree with them.
Sad fact is youth do get stronger quicker shooting bows. No doubt in my mind she will get stronger. But if she struggling starting out it may be conunter productive.
Elite bows, Vortex Binos, Trophy Taker sights, Carter releases, Goldtip Arrows. CBE sights, Vapor Trail Strings, B Stinger stabilizers