No man is an island entire of itself
I think that it is possible to find people who complement oneself so perfectly that soulmate makes a good description. I think that I have found two such people in my life. One was my wife, and it lasted for over 20 years and could have lasted for life. Our family was ripped apart by a chain of events started by medical condition in my daughter which affects two people in a million, and the woman I married does not exist any more. The second was more debatable because my age precludes making her fully complete.
Can everyone have one? I suppose that it depends on the state of ones emotional development and what one feels necessary to achieve completeness. Some people seem so devoid of humanity that I would think it impossible.
And therefore never send to know for whom
the bell tolls; it tolls for thee.