Atheists also reproduce without any pray, but for what reason Theists say that Atheists can’t enjoy happiness?

Religions say that without praying to God, nobody can enjoy life or get liberated. It is a known fact that by joining (Yoga) with the spouse, an Atheist also can enjoy and reproduce. A pray to God Almighty is not needed for this purpose. Then what is wrong in saying that by joining (Yoga) his Mind with the Universal Mind (Peace), an Atheists can enjoy Ananda and get liberated without a pray to God? Yoga with a cold substance will give coolness. Yoga with a hot substance will give hotness. God, Religion or Prayer is not necessary for getting coolness and hotness. Everything happens naturally and where is the need of a God?