If I want an introduction to complex topic, I usually won't use man pages. I will open up a web browser and search. That will give me web pages that have pictures, diagrams, and possibly even introductory essays about the topic.
There are many more people who know how to write web pages or forum posts than who know how to write "info" pages. There are also great tools for searching the web, but poor tools for search info pages. "info" pages can't even have diagrams or pictures. Consequently, information obtained via "info" tend to be stale, incomplete, and generally unhelpful.
The real question is why "man" pages are still useful in the era of the internet. The answer is that sometimes, you want a concise, accurate, quick reference to what is installed on your system. "man" fills this function admirably. "info" fills that function awkwardly and poorly.
There are many more people who know how to write web pages or forum posts than who know how to write "info" pages. There are also great tools for searching the web, but poor tools for search info pages. "info" pages can't even have diagrams or pictures. Consequently, information obtained via "info" tend to be stale, incomplete, and generally unhelpful.
The real question is why "man" pages are still useful in the era of the internet. The answer is that sometimes, you want a concise, accurate, quick reference to what is installed on your system. "man" fills this function admirably. "info" fills that function awkwardly and poorly.