Not sure that is accurate. I have seen at least videos of girls competing at nationals with the vault my daughter does. I also know gymnasts on D1 teams who have competed it in the past.I know it doesn't happen at nationals though
but I understand your point and I am not arguing. If a gymnast can compete a vault with a start value of 9.9 and execute it close to perfection I think scoring a 9.7-9.8 should not be discounted.
with downgrading in NCAA vault values aren’t there many at top school not vaulting with a 10 start?