One would assume that a 24.75" inch scale would be more suited to shredding cause the frets are closer together and the strings are looser, but apparently is isnt...
Because the guitars they used originally in the late 70's and early 80's were strat based guitars.
Things like Charvels and Kramers were built because people were already taking strats and modifying them.
The reason being was things like the fact it has a pickguard so it was easy to change electronics, they already had some tremolo routing, removable necks to get the setups right so they string action is low etc.
I guess it just followed.
Plus in reality the difference in fret width is minimal, however for holding a tune the longer scale is better for the light strings which are better for bending.