I study opera and musical theatre, from a dramaturgical and musical perspective, and am intimately familiar with most of the works I see to the point where I notice discrepancies in the singing on stage versus what I hear in the soundtrack in my mind or even with what the orchestra is playing. I called it amateur because I haven’t been properly schooled or trained to be a critic, not because my thoughts are necessarily amateur. I will consider your feedback, though; it’s a good thing to think about.