...because the kind of happy feel love gives is not obtainable just with money. Even if you try to argue "money can help my find love without having to work, making love come to me quicker!" still, you'd be looking for love. That isn't the same as being that happy with money alone. If I am poor and I find love, then I am happy, but if I am poor and find myself rich, I am happy as well.
The difference between happiness from money (material things) and emotional connections like love (non-material) are not equivalent. So it ultimately depends on the person. Some people don't really value social/emotional connections like they do material possessions. So in the end, my opinion is just that--an opinion.