Yet Adam was God's name for them when they were created. You read the story in Genesis 2 and it sounds like Adam was God's name for a single man he created and everyone since then had their own names. So why does the bible take the name of the first individual God created and treat it like it means a lot more than one? I have heard plenty of attempts to rationalise it, but the simplest and the one, that fits how God so often speaks to us in scripture, is that the story in Genesis about God creating Adam is a parable, and it is really about God creating the human race, male and female, them.
When the creation of man is first mentioned, it is mentioned as God creating a "him" in His image. Parable, parable, parable. Trying to argue that "Adam" is purely an element of a parable holds no weight whatsoever. Even the original Hebrew makes a distinction between the generic reference to the "umbrella" of humanity (them) and the first human being a unique person (him) who lived, had a wife and had children. It is strange how you go around highlighting all the "them"s and yet ignore the "him" that is present within that first line, which represents a single, unique being.
Look at how the flood is described, it explains Gods reaction to the wickedness of man, but the language is straight out of the creation account and the word for man is the same ha'adam we read in Genesis 2.
Gen 6:5 The LORD saw that the wickedness of man was great in the earth, and that every intention of the thoughts of his heart was only evil continually.
6 And the LORD was sorry that he had made man on the earth, and it grieved him to his heart.
7 So the LORD said, "I will blot out man whom I have created from the face of the land, man and animals and creeping things and birds of the heavens, for I am sorry that I have made them."
It talks of God making ha'adam and blotting out ha'adam he had created along with all the animals and birds. This is God saying he had created Adam and was going to drown him in the flood. Except Adam if he was literal would have been long dead at this time. Instead Gen 6 is treating the story of the creation of Adam as if it was really about God creating the human race, not a single individual.