I hate how they have used art and music to crush dreams. The child who was denied advancing his skills as a violinist because it would "rob" him of studying about god and put him in with "worldly" children. The use of a skilled artist making glass - even if he went to a master in glass to learn, it's no different from being in a college class.
It looks like the speaker enjoyed breaking that stupid glass they purposely made wrong.
One of the last talks I heard at the sunday meeting, was about how people were like Korah when they disregarded the GB's warning about college. "The Society has published so many articles about not going to college and yet, a person will point out one paragraph that says 'it's up to your conscience'" The speaker was fuming and yet couldn't see that he was basically saying that there was no choice at all, you must obey the GB.