Parables illustrate a point. The point of the parable you cited is not the existence of hell, so it is not a suitable vehicle for determining doctrines about hell.
Let's cut to the chase:
Do you believe Hell exists?
Do you believe there are souls now in Hell?
Parables are insufficient for doctrinal foundation.
You're truly amazing with your rationalizations.
Are you a Jesuit, perchance?