First of all, your entire post was essentially "sitting at my desk at home reminds me of sitting at my desk at work." For most of us, our jobs are easily distinguishable from gaming, even if we are staring at the screen the whole day.
Secondly, the weather doesn't explain why you feel the need to "unwind" on a sofa instead of a chair. You can always go to the gym, exercise at home, or walk outside. All of those, however, will require more effort than "spending afternoons at the golf course"
I spend an hour and a half at the gym every day during lunch. In fact, I'm leaving for the gym in 11 minutes (Shoulders, arms, and cardio today...I'm doing HIIT supersets for the spring cut) If you want to go home and walk outside in sub-zero temperatures, which it's regularly been this winter, have at it, but I've already gotten my exercise for the day at that point. Don't act like you know my entire day's routine based on what I do when I get home. That's very sophistic.
Most evenings I don't even go home and game; and some of those times I do elect to do so on the PC. Some of those times I don't want to sit in an office chair at a desk. Un-clench your butthole, dude. Does it really rustle your jimmy that some people unwind in different ways, and for different reasons, than you?