Surely the difference is you are getting paid, and if your boss says, help these guys out, you can do it? As opposed to some guys with jobs who have a project on the side. The big guys could even do something like offer to pay the maintainers and maybe they can take leave or something.
I agree with both sentiments. The big guys are under no obligation to fix an issue in some library they happen to use. But the log4j guys are under even less obligation when they do it in their spare time.
Everyone should enjoy their weekends.