Science has a definition for biological life. It creates an objective line between life and not-life. Do you not know that definition, or do you willfully choose to ignore it?
But the thought that "life begins at conception" is just an opinion. It's no different than picking a specific day on the calendar to call the "First Day of Spring". An entire process happens, beginning with the formation and maturation of ovum and sperm and "ending" with the birth of a child. Picking one moment of that process and calling that the beginning of life is just putting a label on that moment. All of the other moments during the process are just as important.