The soy people have told a lot of lies and used a lot of muscle to get their stuff into the marketplace.
There is an enormous group of doctors who are dead set against it.
Lots of people are deadly allergic to soy, too. Some don't know why they feel so terrible. If my grown daughter gets even a smidgen of soy flour in something she has to be taken to the emergency room.
As I recall,at one time the only approved use for Soy was as a glue for cardboard boxes. The industry got hold of it and started making claims. I think that it is an extremely hard to digest protein and avoid it (goes for chick peas too!). Has hormone like substances that turns men into steers.
If someone wants to lower cholesterol eat avocados. Raises the good fats, lowers the bad. I had something like a 20% reduction in the bad after 1 month of an avocado a day. (I don't grow them, sell them, or trade them!) They also make a great baby food.