Actually it was more than shear numbers. The Sherman down through the line shared alot of similar parts unlike many of the German tanks. It was assembled by unskilled workers, where most German tanks had such close tolerances and needed skilled laborers to assemble them and did have a strict maintenance schedule in the field. But instead they had to rely on slave workers instead which could account for most of the failures German tanks suffered from. This made the Sherman very reliable.

Everyone's entitled to their opinion and call it what you want, the Sherman (like the T34) was the right tank at the right time for the Allies.