I am doing a critical anlysis of the story "The Lottery"--what is the purpose of this story?Is the purpose similar to the themes or is it different?

The purpose of "The Lottery" is related to the themes that
Shirley Jackson develops in the story.  One of these themes has to do with the nature of
customs, traditions, and rituals.  The story questions people's practice of blind
adherence to traditions even when these traditions prove harmful to those who practice
them.  In "The Lottery," the villagers do not remember how the lottery started nor what
it is supposed to represent.  Even the eldest villager Old Man Warner cannot explain the
significance of the lottery--he simply supports keeping the tradition going because it
part of their custom and he is resistant to change.  When Tessie is chosen as the one to
be stoned, she claims that it is not fair--but would it be more fair for someone else to
have been chosen?  Jackson's story poses this question, and thus the purpose of the
story is for readers to consider their position on custom and
tradition.