What you describe is subtly different from what is in the article.
The article is about Google (and other traditional search engines) snatching away clicks from web site owners. What you describe is AI tools (for lack of a better word[1]) snatching away traffic from the ruling gatekeepers of the web.
I think the latter is a much bigger shift and might well be the end of Google.
By extension it will be the end of SEO as we know it. A lot of discussion currently (especially on HN) is about how to keep the bad crawlers out and in general hide from the oh so bad AI guys. That is not unlike the early days of search engines.
I predict we will soon see a phase where this switches by 180° and everyone will see a fight to be the first one to be accessed to get an opportunity to gaslight the agent into their view of the world. A new three letter acronym will be coined, like AIO or something and we will see a shift from textual content to assets the AI tools can only link to.
Maybe this has already happened to some degree.
[1] Where would I put the boundary? Is Kagi the former or the latter? I'd say if a tool does a non-predetermined number of independent activities (like searches) on its own and only stops if some criteria are fulfilled it is clearly in the latter category.