Makes sense. The worst part about a combined subway-train commute is the unpredictability of the subway, especially if you are doing an additional transfer. Because that means you don't know if you'll make the train you want to take home, unless you leave a lot of extra "just in case" time. At least with walking or biking, you pretty much know exactly when you'll arrive.

If we all lived in Central and Northern Europe where the trains run like clockwork every 5 minutes it would be different.