Earlier quoted context omitted.
Many doctors also tell pregnant women to stay away from soy. One doctor linked me to a study that male babies from mothers that drank soy during pregnancy had statistically smaller genitalia. You might be right about “overly cautious” but I think doctors being that way is more reputable than gym rats quoting their favorite fitness blog.
Pregnant women have been consuming soy foods for thousands of years in East Asia, there should be an overwhelmingly large amount of studies that suggest ill effects to weigh against that.
We also took insane child mortality numbers and all kinds of defects for granted.
Our mothers still consumed food that has a tendency to contain/grow listeria. Then it was found in several cases where the reason for the death of the child was not known.
Now pregnant women (at least in Europe) are strongly advised to avoid products from raw milk and uncooked meat (hams and salami.
Things change, and not without a reason.