I do agree with what you've said here, and you've said it very eloquently. But for the sake of my understanding I'm going to play devil's advocate.
Does a capitalist society really benefit from discouraging free thought? And is to do so a conscious decision by the ruling class, or is it just the nature of the system in general? Libraries, bookshops and newspapers have existed for a long time, and information flows quite freely on the internet. I hate AI, but I struggle to imagine some shadowy cabal created it with the goal to dumb down the population; that feels more like an insidious side effect. Obviously it was created with profit in mind though, and organisations are only to happy to replace workers with AI if it'll save them some money. The fact that it's available to the public feels like a way to appease the general population and get us used to its existence more than anything. So we gain some small 'benefit' from it whilst it replaces us in the workplace.