They have basic obligations as highly trusted FOSS software maintainers, a role they allowed themselves to be elected into, to make sure their hard earned goodwill and trust is not stolen by a bad actor. They also have a basic obligation to make sure they have accountability and review of all code before it gets to their users.

Sitting back and expecting Microsoft to keep the community safe is going to continue to end badly. The community has an obligation to each other.

Like, no one is making someone go bring a bunch of food to feed the homeless, but if you do, you have some basic social obligation to make sure it is sanitary and not poison.

People who give things away for free widely absolutely have obligations, and if they do not like those, they should hand off the project to a quorum of responsible maintainers and demote themselves to just a contributor.