There is no definitive answer, but there is certainly potential for a blog post to serve as a landing page. It all depends on the elements that make up the blog post, and what goals the author hopes to achieve with it.
One key consideration is whether the blog post is designed to capture email addresses or leads. If the goal is to generate leads or sign up for email notifications, then a blog post might be an effective landing page.
On the other hand, if the goal is simply to share information and build relationships with readers, then it might not be necessary to create a separate landing page.
Another factor to consider is how interactive the blog post is. If readers can easily sign up for email notifications or make a purchase from within the post, then it could be considered a landing page.
However, if there are difficult steps involved (like filling out a form) then it might not be as effective.
Ultimately, it depends on the goals of the author and how they plan to implement their blog post into their overall marketing strategy. As long as the content is valuable and easy to understand, then it could potentially be turned into a landing page.