If the Cathar Heresy (so-called) is true then this may well be correct.
They said that there are two Gods (hence the Albigensian Crusade) - one good and one bad. They said that the bad one made this world. If this is also true, then why did he introduce Love? I can think of one reason immediately:
There are no absolutes. We live in a relativistic world - no up without down; no evil without good; no love without hate. Without love, hate would be an absolute and we would not notice it as it would be all there was. We would not even have a special word for it. It simply would "BE".
Alan Watts wrote about this kind of thing back in the 1970s. Before him, Socrates. Heracletes of Ephesus, or was it Empedocles of Arigentum (?) wrote of "The Harmonious Conflict of Opposites" the oneness of duality.
In a relativistic world there can be no conquest of Evil, for to remove Evil is to remove Good. Nor could Good be entirely eradicated. One thing cannot exist without the other. Without the capacity to feel Love we would be unable to experience Hate, and vice versa.
In a relativistic world created by a Loving God, of course, the argument would be the same.
If I had to choose, then I would say that a loving God created this world. That we may altruistically sacrifice ourselves and our possessions supports this view. Without the capacity for love all sentient life is reduced to that of a vegetable; a utilitarian, mechanistic Newtonian paradigm.
Musashi.