Earlier quoted context omitted.
Counter point: Companies have made their pages as hard as possible to access with automated tools. People move to agents, if your site is "invisible" to agentic users (no API, no MCP) people won't find it. Companies start opening up APIs - which lets non-agent users like us create tooling on top of it _without_ agents.
Do you have even an example of this (one should ask for measurable data openness) or are you just making stuff up? Everything around has/is becoming more closed and I have one example: Reddit. It is not impossible to read without an account (account-walled).
So if someone is looking for a 18V cordless drill for drilling into concrete, they'll most likely ask an agent. If your site has bad AEO/GEO, the product pages are either impossible to read by an agent or the data is badly formatted -> the agent won't recommend your product, resulting in a lost sale.
Like SEO gave us OpenGraph and similar common tools to provide data in a machine readable form, AEO/GEO will force data to be readable by agents.
Some sites like Consumer Reports block all crawlers, so we'll see how that goes for them.