The "Open Web" works only because the affordances are here.

As AI allows to easily create and consume content, these affordances for the open web have changed. For those who want to sell ads next to their content or entice people to subscribe, the rise of AI feels like betrayal.

Furthermore, on a technical level serving content to anyone who asks for it on a global scale might be a commodity service now -- and so very inexpensive to do, in some cases -- but it’s not free, and the costs add up at scale.

It's about control. As hyperbole, some what pixel-perfect control over the information is presented, used and its conditions, whereas some open access advocates want all information to be usable for anything without conditions. Both would be bad for the Open Web