It's a matter of encouraging health in a community. A lack of proper resources(which can be everything from documentation, tutorials, guides, libraries, to tools like Ember-CLI) can lead to mistakes in design and part of your community going off on a tangent, which leads to dead branches of development trees.
For example: While React still works for a lot of people who did things in ways advocated early on, the rise of Redux and functional reactive programming has caused the community to move in a direction many library authors weren't aware of when they began.
Is it anyone's fault? No, not really- but taking advantage of stewardship in a community can lead to better tools and resources that help newbies, take some of the work out of your hands, and keep quality for everyone as high as possible.
For example: While React still works for a lot of people who did things in ways advocated early on, the rise of Redux and functional reactive programming has caused the community to move in a direction many library authors weren't aware of when they began.
Is it anyone's fault? No, not really- but taking advantage of stewardship in a community can lead to better tools and resources that help newbies, take some of the work out of your hands, and keep quality for everyone as high as possible.