Just plain silly if you ask me. Softball is primarily a sedentary sport that doesn't require much stamina. They should be tested for sprinting. It's all about quickness, not endurance.
I am all for conditioning, but just because DD can't run a mile doesn't mean she isn't an outstanding SB player.
Daughter played DI college VB and they had NO mile requirement, just that you could run a mile! Their girls DI BB team also had NO mile requirement. She said boys BB had a 6 minute requirement. Only girls (s o c c e r) & (l a c r o s s e) had mile requirements (makes sense).
College coaches know what is important, and I would be surprised if very many require a 6 minute mile!