Tell me the reason it is necessary for the project to create ANN on bitcointalk.
Although depending on different projects they have their own channels to discuss their issues privately, so I don't think it is an important issue.
The reason is that ANN was created to support a more formal and targeted project explanation regularly for their project, this serves as constant support for themselves and that is very good for projects that do not have ANN at all, and for discussion on their channel itself is an extra thing for a project that can help everyone in the channel, so doing more promotion of a project with different things I think it doesn't matter and can even be a very good thing for the project.