Is marriage really a requirement to life for most? Maybe for some but I still believe there are others that lives a more fulfilled life for themselves without getting married. There are also a few religious persons that there region or tradition forbids them from getting married or birthing a child.
Life, life is just as complicated as that. It's never fair to anyone nor does it present to some an advantage over the rest. Even the rich have got places that irritates them too.
We've just to keep trying and figruing ourselves out with every step, making mistake and correcting them.