You can be if you want to but social skills should not be a requirement to lead an open source project. If you create something and share it that doesn't oblige you to even respond to anyone.
Of course, a hobbyist putting his code out there is under no obligation whatsoever. But we aren't talking about small time hobbyists here. These are professionals who are either paid as part of their job or else contribute their spare time to maintain important projects that are part of a large ecosystem that is relied on. There's a community and it necessarily has behavioral standards as part of the shared goal of maintaining group cohesion.