GPT-3 can bullshit many things convingly enough and at scale to make people reshare and vouch for it. Also, other chatbots can leave comments and reshare masquerading as real opinionated supporters in a “mob” and likewise barely answer you.
Remember… it’s not that you the one person who talks to them has to be convinced. It’s that your existing forums and chats and platforms can be gradually infiltrated with bots that convince OTHERS the vast majority of whom never did a turing test.
Think of how your opinion was formed on many political things, it likely happened non-interactively by just consuming articles and comments, and seemingly “defeated” arguments of OTHERS who could have all been bots.