I think it is unfair to say people are lazy or uninterested. I learned only because I happened to meet someone at work who sailed. Since I have started to learn I have talked to my friends about how much fun I am having. They are all interested, but honestly, I usually have to explain to them what a catamaran is. Some say 'after you learn take me!' Some think I have evidently lost my mind.
I really think the problem is more a lack of awareness among the non-sailing community.