That's a good point, but it would apply equally to Protocultural creations discovered and raised by human researchers.
Grace's team has tech that's beyond what the other humans seem to have. It could be her team is somehow feeding protoculture tech to LAI etc. in trade for weaponized version of that tech.>>13029787
I agree that is a likely candidate for Grace's goal, but isn't it a bit fucking stupid to kill all of the most racist Zentradi? You know, the ones who would be happy to go to war with humanity?