I don't think obsessive is the right word. We don't think of automobile commuters as obsessive simply becasue they always drive their cars.
In fact, I'm no more committed to my preferred mode of transportation than the typical car owner.
I'm not sure I buy that unless you somehow have become unaware of how you're swimming upstream and how strong the downstream current is. I don't mean that as a put-down. I wish I could get there with you.