idk, s o y has been used as a meat substitute here for decades and people don't seem all that affected. store bought processed meats like sausages, hot dogs, meatballs, etc. have had s o y as long as i can remember and they don't seem to be affecting people.
if i had to guess it's less due to s o y and more due to the fact that western mainstream culture supports and encourages faggotry vehemently. so if you're a retarded teenager who doesn't fit in, you might be easily convinced that cutting off your dick is a good idea, because being a straight male is so evil and all. and maybe plastics have some kind of role in it