No thats not true. The actual Shermans were used in this way so its as if you are asking for less realism. It is true they were ranged by observers but we dont have those.
indirect fire...nowhere near as accurate as the laser guided sighting in ah...no further than 3 or 4 miles...absolutely not 10...tanks were and are front line troop support weapons...that means close range, not 10 miles behind the lines firing like artillery...3000 yds with the sighting systems used in ww2 vintage tanks was a very good shot.
keep in mind the 76mm main gun on the m4 sherman was a modified field gun that had an effective range of about 3.04 miles...then they shortened the barrel by 15 inches which reduced the performance a little.