I write PHP professionally, so I agree with his conclusion, but this is a strange take:
Enterprise developers are usually working in large teams with DevOps support, continuous integra- tion pipelines, containerized deployments, observability, and more. In contrast, web develo- pers building small business websites, forums, blogs, or landing pages have to prioritize and opti- mize for cost and simplicity.
This is where PHP shines: the deployment model is dead simple. Write code > Deploy via FTP > You're live.
All of the things in the first quoted sentence can be and are being done with PHP. And in the enterprise, cost and simplicity are still seen as high priority.