Some people question the existence of God. Especially a God who would allow horrible things to happen to good people. Some have stopped asking questions, some cease to seek for God. Some seek the higher power within themselves. (There isn't one, btw)
Numbers have their place, but they are not the be-all and end-all of the Holy Scriptures. God is the God of Math. He is One and Three. There was no big bang. There was no evolution. There is Creation. By the Trinity of God. Genesis 1:1, 2 "In the beginning GOD created the heaven and the earth.And the earth was without form, and void; and darkness was upon the face of the deep. And the SPIRIT of GOD moved upon the face of the waters." Genesis 1:26 "And GOD said, 'Let US make man in OUR image, after our LIKENESS: and let them have dominion over the fish of the sea, and over the fowl of the air, and over the cattle, and over the earth, and over every creeping thing that creepeth upon the earth." They worked together, in unity, as ONE bringing about the existence of every living creature, even mankind.
So, GOD created one man and one woman. He told them to multiply. He did not tell the monkey to evolve. He did not create 2 men or 2 women. One man + one woman = one relationship, one union (Genesis 2:24).