Science is not decided by decree of "authority" but by the data. The 424 IAU members are not the ones "in the know" about planets since most are not planetary scientists but other types of astronomers. Many planetary scientists have repeatedly asked the IAU leadership to reopen this issue and offered to help with it, and they have continuously been rebuffed.

Everyone who has taken the time to study planets has a right to be part of the definition process. I went back to school for this, and I am not one of "the rest of us" who will submit to a terrible definition crafted by those who know less about planets than I do.