ZBrushCentral

Why use other 3Dapps like Maya/3Dmax for making Mesh for making Human/Creature ?

Hi,
this is a beginner question.
why most people/artist create their mesh for start using 3Dmax or Maya, why not using Zbrush ?

what’s the advantage using other apps Mesh ? other than using Zbrush ?
is it easier or you will get better Polygon control/result ?
or much less polygon result ?

Cal