Watching Farsights productions, it becomes clear that humans on this earth are lacking in telepathic skills compared to many of the entities encountered while remote viewing. Other peoples thoughts here on earth don't seem to be available and maybe this is a reason for certain "souls" to want to come here.
Imagine if you were in a world where thoughts were public knowledge. Just ponder the implications; lying would be a joke, cheating on your partner kind of dumb, pretending to be what you aren't won't work either (politicians etc). In short, most if not all of the stupid things that people do to each other would have to change or stop altogether.
Now imagine you are a soul that is truly psychopathic and you wish to do harm to others. What a great place the planet earth would be because no one would know what you are thinking! In addition to the reasons Courtney proposes that souls would want to escape to this place, perhaps our planet would be an inviting playground for those who are truly devious. I myself know one or two!

The late great Ingo Swaan had some illuminating things to say along these lines.

Secrets of Power volumes one and two. "The aliens are already among us." Ingo Swann. We get bombarded by everyone's thought everyday.
You can shield, delete, strengthen your midline for health and greater realization. Yes, a dumping ground for enlightenment and marauders. The reptilians are adept at shielding stopping thoughts. Something we must learn to do. "Nothing is true, all is permitted." William Burroughs.