Value of combined unit direct fire

[Reddog]

Using the same example of 3 PzIVH tanks in a hex as noted above...then why is it when you group fire the value shows 3 times the hit number of what 1 tank would shoot. If there is no benefit to group fire as in strength points why does the game show the total number of all units firing? A false sense of a better chance to cause damage... IMHO.