Automatic site maps are generated by search engines such as Google to help them index the pages on your website. While this can be a convenient way to ensure that your website is being indexed properly, there are some reasons why you may not want to rely solely on automatic site maps.

Incomplete Indexing: Automatic site maps may not always capture all of the pages on your website, particularly if you have a large website with complex navigation or dynamic content. This can result in incomplete indexing and lower search visibility for your website.

Limited Control: When you rely on automatic site maps, you have limited control over how your pages are being indexed and what information is being communicated to search engines. This can make it difficult to optimize your pages for search and ensure that they are being ranked for the right keywords.

Duplicate Content: Automatic site maps can sometimes result in duplicate content issues, where search engines index multiple versions of the same page with different URLs. This can negatively impact your search rankings and confuse users who may be directed to the wrong page.

Security Risks: Automatic site maps can potentially expose sensitive information about your website, such as the location of hidden files or directories. This can create security risks and make it easier for hackers to access your website.

They should not be relied on as the sole method of indexing and optimization. It is important to have a comprehensive SEO strategy in place that includes manual site mapping, keyword research, and ongoing optimization efforts.