Why would I regret it? I work on open source projects to satisfy a particular itch. I can work on an interesting topic in my free time and drop it if I get bore

Why would I regret it? I work on open source projects to satisfy a particular itch. I can work on an interesting topic in my free time and drop it if I get bored. I don't have the stress of worrying about deadlines or monetization. The fact that it sits out in the open rather than hidden away on some dusty hard drive is a perk because at least a few people have found them useful. If you can utilize their features to make money yourself, good for you. Why should I care outside of greed or envy?