You do not have the actual pitch distance, you do not have the actual pitch speed, you do not have a swing velocity, you do not have external weather condition numbers, you don't have bat exit velocities. Your study does not mention or take into account added forward momentum of the pitching motion and the impact on ability to move back after release.
You have no factual measured numbers to be argued against.
What study do you want them to share? Coop stated that a study had not been performed on moving the rubber back and that because no study had been done people were not willing to make a blanket statement. If you actually read the comments it states that moving the mound back alone cannot be guaranteed to increase reaction time because there are more variables that need to be taken into consideration than simply the increased distance. Nobody has said that pitch speed is more dangerous (I challenge you to find me one direct quote from whoever it is that you consider to be a softball elite to the contrary).
They have stated that science would reason that by increasing the distance of the pitch while maintaining the same maximum height would require an increase in pitch velocity which when struck by a swing of the same force would increase ball exit speed. The impact of this increase on safety cannot be identified simply by looking at these figures because there are other variables that would have to be taken into account. The simplest of examples of one such variable as I continue to mention is the increased forward momentum of the pitching motion and the impact on ability to change direction to backup after release. To increase the pitch speed would require more forward push toward the batter.