A man wearing a long brown robe is playing the guitar while another person is sitting at the drums and yet another is wearing a long gray robe and singing.
The man is a great guitar player.
A man playing the guitar is not assumed to be a great guitar player.
Just cause someone plays a guitar does not mean they're great at it.
Just because a man wearing a long brown robe is playing the guitar while another person is sitting at the drums and yet another is wearing a long gray robe and singing, doesn't mean is great.