Its not always neccesary that you will succed in what you have chosen or you like to do sometimes the path that life leads you to might be better nd simple!
And as in the case of deer he is bound by responsibilities he has to overlook his herd! He cannot in his freewill go around doing something he likes.
life may or may not be simple and you dont always have the right to choices some you make some you are forced to. ;)