Can't speak to the "actual" reason, but that one was certainly true.
Yup, to quote Wiki:
The dispersion of the EFRB shell is more than three times that of the FH-70 field howitzer at its maximum range of only 5 km less, and is twice as great as FH-70s at 20 km (66,000 ft; 12 mi). Its maximum range with the M107 projectile is the same as any 39 calibre 155-mm gun and its dispersion about the same. (The “dispersion” figure means that 50% of shells will fall up to the stated distance either side of the mean point of impact, but 100% will fall within 4 times the probable error either side.) Dispersion of this magnitude significantly reduces the tactical value of the equipment.
We need to be accurate to hit hardened small targets. If our troops are in danger and need fire support, accuracy is important and I am all for it. As to collateral damage, though, I don’t really care. Although the masters in charge of things see it differently
Whatever happened to copperhead guided rounds? Cost?