The author misses an even scarier prospect - people will want to run such an AI. They will be absolutely giddy at the prospect of running such an AI and it won't be anything like a really smart human trapped in a computer.
AI is already laying the groundwork if you look around today. Every other tweet is a DALL-E[1] image. They are everywhere. DALL-E is increasing its reach while simultaneously signaling that it is an area of research worth pursuing. In effect kicking off the next generation of image generating AIs.
Generation is an apt term. We can utilize the language of organisms with ease. DALL-E lives by way of people invoking it, and reproduces by electro-memeticly - someone else viewing the output and deciding to run DALL-E themselves. It undergoes variation and selection. As new research takes place, and produces new models, they succeed by producing images which further its reproduction, or it doesn't and the model is an evolutionary dead-end.
AI physiologically lives on the cost to run it, and evolves at the rate of research applied. Computational reserves and mindshare are presently fertile new expanses for AI, but what occurs when resources are constrained and inter-AI conflict rises? I expect the result to look similar to competition between parasites for a host - a complex multi-way battle for existence. But no, nothing like a deranged dictator scenario. Leave that for the movies.
1. or variant thereof