If reaction time is the reason for moving the rubber back three feet then I would have to say those people have never pitched. Three feet wouldn't even be worth the effort if thats the main reason!!
Chance's are they haven't! But OHSAA follows the NFHS Fastpitch Softball Rules, which in turn modify their rules from the ASA which is the governing body of Softball.
I agree with you, A ball exiting a bat at 65 to 80 mph will reach a pitcher 35' away in about 1/3 second much faster than normal human reaction time. That same ball travels the additional 3' in 3/100's of a second. How is this a safety factor?
Actually, pitching distance is strictly a function of age and body size and strength. Young girls start out at 35'; teenager's pitch at 40', adult women throw from 43', and adult men throw from 46'. IMO It's not safety; as much as it is a competitive rule to prevent pitchers from totally dominating the game. As such, there is no reason in the world to force high school girls to pitch from a longer distance.
Oh well! It may help the pitcher that has a nice breaking pitch, and may hurt the pitcher with an average fast, However I can see the day coming when the Game Face or other face protector will be a required by the NFHS or OHSAA for all H.S. pitchers.
Fastpitch! Anything else, and you're playing to SLOW!