Depends if the person is an outlier, in my experience people that are an outlier in one field or area usually are in others. In my experience prof devs often work in large teams of 2-10-20 developers and you learn from your peers if you want to rise to the top of the heap you have to know more adopt quicker and prof devs are in it for the money so there is motivation. Further to that if you are on a salary usually working with the latest and greatest tools and who ever is running the show will always be on the hunt for new and better and faster. Final point you learn from the the tech you might be using as well.