InsertNode: Header tag level demotion

A node title may typically use <h1> or <h2> tags. But this may present a problem if it is used in another node, which may already have heading tags at the same level. eg. you can have only only <h1> title.

But if there was an option to demote the headers by one level, all would become kosher. ie. Consider a node having <h1> and <h2> headers, and inserting the node into another which already has <h1> tags. By "demoting" the <h1> and <h2> tags to <h2> and <h3> tags would solve the problem?