Much, much more likely it's to give him thinking space outside the office (a.k.a. the place where deep thought goes to die).

I've often walked to work and back in my career, including in times when it's cold and slightly rainy. Typical walking commute: about an hour each way. I've done some of my best work during these walks. It had nothing to do with Stoicism or being some sort of Valley-esque "elite", it's simply too hard to spend time in an office staring in silence at the wall without being interrupted or feeling weird. Plus walking gets the blood moving through the brain.