Because human history is filled with class struggle; societies, particularly more modern, consumeristic societies, project and support an image of wealth and consumption as being necessary for personal meaning and satisfaction. Rationalizing why "less" is better (such as a smaller house, an old truck, etc.) is often a means of pushing back against that judgement and instilling value in what a person possesses at that moment. In short, it's a defense mechanism, and a very healthy one I think.
It could also be that a person really does prefer a smaller house. I know that I could afford a pretty large place, but there's no need to have a living room, den, home office, main room, kitchen, dining room, family room, and three bedrooms, even if I had a family. I could never decorate that much space let alone enjoy it.
So, in that sense, I am very much happy with a two bedroom, one office, two bathroom house, because I can enjoy it but I don't have more than I need. I don't view that as rationalizing, but knowing what makes me happy and content and living to that point.
Any more than that is excess for the sake of excess, and is the epitome of consumerism.
It could also be that a person really does prefer a smaller house. I know that I could afford a pretty large place, but there's no need to have a living room, den, home office, main room, kitchen, dining room, family room, and three bedrooms, even if I had a family. I could never decorate that much space let alone enjoy it.
So, in that sense, I am very much happy with a two bedroom, one office, two bathroom house, because I can enjoy it but I don't have more than I need. I don't view that as rationalizing, but knowing what makes me happy and content and living to that point.
Any more than that is excess for the sake of excess, and is the epitome of consumerism.
