Honest question, why should I worry about adding value to a market which I'm not actively pursuing? I'm a developer and buy domains on whims of various service

Honest question, why should I worry about adding value to a market which I'm not actively pursuing? I'm a developer and buy domains on whims of various service/fun ideas. I've been interested in domains since early highschool and collecting them is a hobby of mine which has happened to earn me some money from people reaching out to me.