>>18078418That part was a commandment for adam and eve, as to create first children and sustain humanity as a whole, it was a duty assigned in order to preserve the humankind, although again, having a family is good.
<Biologically speaking, you are correct, but not every member of the species ends up successful in finding a mate. You may find a good wife, and that shall happen if God wills it to be, however, not everybody needs to breed. Jesus told us that some people are born with the calling of celibacy after all.