The WordPress community operates on an open source, non-commercial basis. The community decides what is included in each release of WordPress, how it's tested, what documentation accompanies it, etc.
Because the WordPress Foundation, not Automattic, owns the WordPress trademarks for non-commercial use, Automattic has no control or veto of what code is stamped with the WordPress label.
By contrast, if Automattic retained non-commercial control over the WordPress trademarks it could refuse to affix the WordPress label to work done by and released by core contributor groups.
In case you are not familiar with how WordPress decisionmaking works: Volunteer contributors self-organize into groups that set their own goals, interface with other groups, allocate resources, plan a schedule, and resolve issues according to a Community Code of Conduct (see https://make.wordpress.org/handbook/community-code-of-conduc...). You can learn about how decisions are made in the WordPress project at https://learn.wordpress.org/course/how-decisions-are-made-in....
I am going to operate under the assumption that others may have similar questions, which is why I think this is a good topic for a blog post.