While that may be true, OP did use this story to dramatize the situation, and I feel help prove his/her point. So I think it is fair for us to criticize the parents.
That being said, it is a shame that capacity is down on this ride, I've been twice in the past three years and am going down again in three weeks, and I've yet to ride TSMM, and I don't know that I will on this trip. I personally don't wait in anything with longer than a 45 minute wait, just my own personal policy. With that policy, and going down in September, I've been able to ride everything else in the parks. What I don't get is, is the ride really that good? Or is Hollywood Studios just that much in need of more rides?