Why so much hate for job/class ideas?

[Julienne]

This idea will never happen because reasons is constructive criticism. They are telling them why it won't work. There is nothing wrong with being honest about it instead of trying to put on a false front knowing it won't work.

Did you read my whole post? There is no constructive criticism being given. People are leaving single word/sentence comments like "terrible" or "your idea sucks" with no explanation as to why they dislike the job idea.