Disclaimer: The last time I went on a crew was eons ago.
Then, you may hang out with the overhead people who have never worked on the line, on a crew, and think ill thoughts of the grunts.
I went as overhead a couple weeks after being a grunt on a 3 week tour of Eastern Oregon bug kill fires. I set my sleeping bag out in the crew area and slept there. One of the office ladies was horrified. "You are sleeping where "Those People" are?". I replied that just a few weeks ago I was one of Those People.
One should have line experience simply so one can know what Those People are going through. Those People are tired and dirty, and don't want to argue about whether they should get paid or not paid for not taking a 30 minute lunch. Etc.
You can be the Greatest Faller Ever and still not know when to run away from a fire that has changed direction, or where to run to, etc. Or who to argue with to be sure you get paid for not taking a 30 minute lunch break.