Absolutely. From high school all the way thru the NFL, most coaches spend a lot of time attending clinics, expanding their knowledge of the game, and networking with other coaches. Hell, back in the mid/late 90's, I used to fly out to Lincoln to attend the Huskers coaches clinics, which were amazing. I learned more at those clinics than anywhere else, and I was a measly assistant coach at the high school varsity level.
Take Josh McDaniels after his last firing as head coach. He literally traveled the country, working with various levels of coaches to understand different concepts/schemes/techniques to see if he could adapt some of the things that are being done at lower levels to the NFL game. For a coach, the game is constantly evolving. If you aren't continuously learning, you will fall behind.
Now I'm sure there are some ego maniacs out there who believe they have all the answers, but for the most part, it is a very common thing.