It's mainly to increase Sikh community and numbers--so Sikhi could flourish, and even spread far and wide from its base of Punjab.
Its so sad that we have forgotten this message of Guru and become lazy.
I opened a thread recently regarding Sikh demographics, but it was deleted because people here believe that I am a secret Muslim trying to defame Sikhi.
Talk about pigeon closing its eyes in the face of undeniable threat...