Because that isn't the claim for ley lines and low frequency sound. Read up about what is being claimed and get back to me. The wiki link I posted to Susan in reply will help.
This is a link to a summary of the book under discussion on the GH site.
https://grahamhancock.com/duffr1/I can't see that it is making any falsifiable or even verifiable claims. It is part of the development of a personal fantasy or mythology - as is pretty much everything on the site.
There are enough references to actual facts to allow you maintain a suspension of incredulity - similar to myths at the start of any cult or religion.
Best enjoyed as an imaginative fiction. A bit like The Holy Blood and The Holy Grail or most religious myths or sf.
As to ley lines or converging low resonance lines, you can just draw your own to any places you feel are spiritual or meaningful.