I think we'll eventually realize that this line of thought is the same as tobacco company apologetics. Napping isn't A/B tested for maximum addictiveness.
Try not to play for 30 days and report back with your findings. I think you are underestimating the amount of time you spend on this filler activity.
Quitting gaming altogether wouldn't have many benefits in my case. I only play on weekends, and usually less than an hour per day. It's not that I'm boasting about a lack of filler activities in my life. I have them. They're just elsewhere.