“Their shape suggests that they are manufactured and not naturally occurring metal fragments.”
Any time you hear words like “suggests”, it’s a big red flag in a supposedly “scientific” argument. Similarity doesn’t actually suggest any one particular thing; you need more than that to declare they are man-made. Perhaps, for example, they are excretions from some unknown organism that consumed minerals and pooped out spirals of metal that it couldn’t digest?
Unless you can disprove such other possibilities, the “suggestions” of their appearance don’t mean much. Also, the shapes being related to the Golden Mean actually point more to a natural origin than a man-made one, since such arrangements are more common in nature than they are in man-made structures.
That explains Debbie Wasserman-Schultz.