"It" can also be murder, or grand larceny, or armed robbery.
Nonsense. Each of these things involves someone being hurt through force or fraud. Two people making a mutually beneficial exchange hurts no one. Next.
Nonsense. Until the day you were born, society recognized harm to society as well as to the individual. You think it all changed because your mortal carcass graced the landscape.
You're wrong.
I won't even say "next," because you have nothing more to add.