The issue with this is that 70 MPH softball pitches are rare, it's much more common to face pitches in the mid 60s. Average D1 is around 64 MPH or 93.87 Feet per second meaning from a mound which from 43 feet away means you have .458 seconds until it crosses the plate. vs baseball and a 91 MPH fastball on a 60.5 foot mound you have .453 seconds until it crosses the plate. Part of the assumption is on release point etc. But time until impact is basically the same. Which is the more common issue.