Let's understand the rule and the NCAA's stated purpose.
The rule says that when eligible players are drafted, they may negotiate with teams, but not have an advisor or agent present during those face to face negotiations, or have the agent/advisor carry, accept, or negotiate on the players behalf. The purpose is to insure that the athlete remains an amateur.
How does having wise counsel, working in the best interest of the athlete, involved in the negotiation process between a 21 year old and a multi billion dollar entity, harm amateur status? It doesn't. So the whole pretext of the rule, is a lie. The NCAA knows it and still SELECTIVELY enforces it.
So, if the NCAA is enforcing it for other reasons than what it states, then it is lying about the pretext of the rule. Either way, the NCAA is lying...that makes them wrong. I don't see much gray area there.