Figma is a tool and nothing more, despite some people to turn it into the end all be all of user experience. It will eventually be replaced with something, just as it replaced Sketch, and just like Sketch replaced Illustrator. I also noticed that the author barely touches on the people who make the interfaces (product designers). If the author gets their wish, businesses won't hesitate to axe their UX teams to save some costs.

Disclaimer: I'm a product designer who is very skeptical of the enthusiasm around AI as I can see a future where product will instead rely on AI instead of designers to create interfaces.