Some Gurus propagate that by becoming laughing Buddha one get Self-realization.+

If you laugh or if you cry the wisdom will not dawn. The one who laughs or cries is the one who is born lives and dies whereas the Soul, the Self is a formless, timeless, and spaceless existence.

Some Gurus propagate that by becoming a laughing Buddha one gets Self-realization because if one keeps on laughing he forgets his physical identity but is merely a theory based on the false self within the false experience.

Suppose one keeps laughing within the dream, the dream becomes unreal when Advaitic wisdom dawns. Similarly, if one keeps laughing with the waking experience, the waking becomes unreal when Advaitic wisdom dawns. The Advaitic wisdom dawns when the Soul, wakes up from its sleep of ignorance.

Thus, ignorance will not vanish by laughing but such acts keep the Soul, the Self in the prison of the dualistic illusion.

Perfect understanding and assimilation of ‘what is what’ is needed to cross the leasehold of the dualistic illusion. :~Santthosh Kumaar