Of course not. That's why I singled out a very specific kind of maintainer: the type who thinks himself superior to users even when they engage at their level. Guys so good they can't be bothered to do it themselves but complain when others do it.

Good maintainers may be firm but they are always nice and grateful, and they treat people as their equals. They don't beg others for their time and effort. If they do, they don't gratuitously shit on people when they get the results. They work with contributors in order to get their work reviewed, revised and merged. They might even just merge it as-is, it can always be refactored afterwards.

That's hard to do and that's why doing it makes them good maintainers. Telling people their "contributions are welcome" only to not welcome their contributions when they do come is the real "low effort".