Weirdly it's not like the author is some crackpot nobody, he has actual papers under his belt[1] and is a Senior Lecturer[2] (although not at a particularly prestigious university, admittedly).
[1]: https://researchportal.port.ac.uk/portal/en/persons/melvin-v...
[2]: https://www.port.ac.uk/about-us/structure-and-governance/our...