You are a PhD student, so what?

Today I went for a training course called 'Challenges in PhD life'. Due to the nature of the talk which covers a broad aspect, it is quite challenging for the speaker to stay really focused or speciallized on certain field.
I came across with a lady--who looked rather old, I supposed at age of around 30 or late 20s, based on the wrinkles she had. I supposed she studies sociology, or policy making, but I did not have a chance to ask her as she was talking to another PhD student who seemed quite confident and capable.
She condemned the speaker face-to-face, refused to keep the notes from the training course, reading own stuffs during the course and keep on complaining on how crap is the course content.
From her speaking, she has an 'A' type personality--in which she can't tolerate with small little things which she thinks is imperfect. However, I could never agree with her attitude in complaining how crap is the training course.
Yes, she might be a very good PhD student in her field, in which her level might have surpassed depth of the training course content, but--her attitude is not helping at all.
First, the main purpose of the training course is to help students to cope with this transition stage--from a classroom-based studying to an independent research self-learning stage. Even if she doesn't have problem coping with this change but just to attend training courses to achieve the requirement of university, she should not affect the speaker in trying her best to help other students. Complaining doesn't help the whole situation.
Second, I wonder why she didn't use her knowledge to add up some spice to the training course, help the speaker in inspiring other students? I think this would be more constructive.
She is a PhD student, might be a brilliant one, so what? I think she's worse than a kindergarten kid who knows how to respect a teacher--although the teacher might not be as good as her, but that person is still a person who is willing to teach and share her experience and knowledge, and thus I think she deserves your respect. If she remained cooperate and stay silent, I am sure that is a good deed.
As time goes by, a PhD student will gain a lot of knowledge, but if they don't equip themselves with wisdom, they are just wasting the knowledge they've learned, as they are unable to put what they've learned into good use--by missing the chance that they might have in order to improve the situation.
What a waste....