Except for the fact it's backed up by independent studies. Of course people will blow their own trumpets - in this case, it's justified.
Top 3 results for me on 'remote working productivity studies', and there are countless more that come to the same conclusion:
https://blogs.lse.ac.uk/businessreview/2021/09/29/remote-wor... https://www.forbes.com/sites/bryanrobinson/2022/02/04/3-new-... https://www.apollotechnical.com/working-from-home-productivi...