Well that was a hasty retreat. Was it something we said?
The unfortunate thing is that the OP had an insider perspective that could have been really enlightening if there was a bit of analysis behind it.
For example, it would have been great if he could have provided some information on the types of students where the Additional Information section was useful, and that if you don’t fit these, probably not worth doing.
For my kids the section was largely filled with research project descriptions and links to the resulting papers. There was no good place to put that elsewhere. We know other kids strong in math and science that did the same, and they also did well in terms of admissions.