That's beyond stupid. The health, productivity and general quality-of-life benefits of love, friendship and "beauty" are very tangible and measurable.
As for your quantification of love, friendship and beauty. Oh boy, i pity that mindset.
What, exactly, is pitiable about the idea that the positive benefits they have on our lives is not just "in our heads", but actually tangible, measurable and provable? You're arguing with a vast body of research that says human relationships and human contact are good for you; why? To score points in a debate by letting you claim that this is some sort of abstract and fuzzy benefit that can't be quantified?