There's the famous story about a philosophy course where the midterm exam question is simply 'Why?' While many students write for the entire hour, one kid simply writes, 'why not?', and gets an A. If this story is true, it highlights that philosophers are very good at talking nonsense and making it seem profound.
Consider comedian Louis CK's riff on 'Why?', and compare that to Richard Feynman's riff on 'Why?'. Both good, but in different ways.