Reading between the lines, the family was probably going around demanding RtQ times. The CM at Pooh probably told them that they had to enter the queue first and try to wait (AQR). Either they pitched a fit or entered and left immediately and demanded a return time, more likely than not with tempers raised given the level of frustration they seem to have been feeling. At that point the CM likely denied them.
I don’t believe for a second that the CM then watched them go to teacups and LEFT their post without something major happening (eg intervening to help the other CM if the parents were being abusive). Just trying to get another RtQ time…no way. They aren’t paid enough and are too overworked to pay attention or care.
I don’t doubt your sincerity, but given that none of us were there and the parents were likely under a considerable amount of stress given their precarious situation and the fact that their vacation wasn’t going according to plan, I don’t think that it would be unwarranted to apply a healthy dose is skepticism to some of what was reported to you. If 99.5% of CMs are wonderful and want to help to the extent that they can, then while it is possible that they repeatedly encountered the 0.5% that are not, the more likely scenario is that there is more going on than what has been said.
As an aside, you keep talking about how the parent is a medical professional, which implies a certain level of income. Given that the family was already on vacation and could not seem to make the accommodations offered work given their situation, perhaps they might have considered a VIP tour? Yes, it is ridiculously expensive, but if one can afford it it sure would have taken away all of the stress that they were facing in what will almost certainly be the family’s last trip to Disney.