For example, I might see an interaction in a prototype I’m polishing that I don’t like the look of. A few years back, I would just redesign it to how I wanted it… Now? I’ll go and have a chat with the interaction designer who worked on it to understand how it works… Then we would redesign it together so that functionality remains.
Growing as a Designer
Luke Jones

This is especially true when you are working in a big company with a large team. Not only the interaction designer worked on it and understand it better, but usually there is a long history of how and why things are kept that way.