You are looking at from a perspective where the chatbots are only used to generate junk content. Which is a real problem. However, there is another far more positive perspective on this. These chatbots can not just generate junk, they can also filter it. They are knowledge-engines that allow you to interact with the trained information directly, in whatever form you desire, completely bypassing the need for accessing websites or following whatever information flow they force on you. Those chatbots are an universal interface to information.

I wouldn't mind if that means I'll never have to read a human written news article again, since most of them are already junk. Filled with useless prose and filler, when all I want is the plain old facts of what happened. A chatbot can provide me exactly what I want.

The open question is of course the monetization. If chatbots can provide me with all the info I want without having to visit sites, who is going to pay for those sites? If they all stop existing, what future information will chatbots be trained on?

Hard to say where things will be going. But I think the way chatbots will change how we interact with information will be far more profound than just generation of junk.