Where do you get the idea imitating someone else is bring vulnerable? Isn't it just a way of trying on their style to see if it fits. Especially when you are listening to them for their guidance and advice?
It happens when you idealise someone else's teaching. You take on their inflections to discover their persona because they are teaching you their ideas that worked for them. To be like them. I don't think it's a bad thing. It's an experiential thing. Like trying on the shoes to see if they fit. You might have to change the style a little for your comfort.
That's what happens when you learn from others. They say imitation is the nicest form of flattery. 
Alex
