I hope those wants and needs aren’t mutually exclusive. I think most open source projects do a good job in catering for both. I’m not involved in Lemmy development so I don’t really know what’s going on here. But I’ve sent one-off contribution to various projects, sometimes contributed single features or helped to sort something out. It always felt appreciated.

Sure, a drive-by commit every now and then and no responsibility is a completely different level than maintaining a (large) project and putting in that effort and dedication. I think a healthy open source project has both. Maintenance and the responsibility/decisions by a core team. And the community contributions make up by adding diversity, being close to what the user needs and adding manpower by a larger group of people, meaning the individual contributions might be smaller, but by many more people. Good communication between the devs and the community usually helps to get quality contributions.