It is like having separate tags for ansible-syntax, ansible-modules, and ansible-conditionals, much too granular. It does not make sense to have a separate tag for questions that are playbook related.
My (extremely) understanding of the Ansible ecosystem is that "Ansible" by itself most properly refers to the entire suite of Ansible-related tools, with most people understanding that saying "ansible" by itself in an appropriate context refers to the playbook tool, for backwards-compatibility purposes. If that's a correct understanding, would it make more sense instead to blacklist ansible and require people to use the appropriate more-specific tag in all cases?
I'm a fan of tag cleanups, so whichever way works best I'm all in favour. Just a matter of determining which way makes the most sense.