Sure it is. Naval’s thinking is to be understood in the context of opportunity costs by having your own value in mind, i.e. how much you can earn (not just in money) by not doing a certain activity that might seem like a savings initially.
That’s why I would never clean my house if I could work an extra hour as a freelancer (25chf vs 100chf), or why I never sell clothes for 5chf (tutti or similar) that I would have to picture, add, pack and take to the post, but would rather give them to the red cross (container under my house)