Why Intelligent robot will replace human hand ?

Why Intelligent robot will replace human hand ? 
1.Save investing cost .2.easy manage .3.high efficient .4.sanitary .5.multifuction .6.advanced technology. and so many benifit for human .
Can use weld reange : food process ,painting ,welding ,stacking ,fire fighting robot,visual recognition and so on which you want to can design .



Robot for fill box ---fill carton ---stacking (packing production line ) :