Why don't we recognize the lifestyle of the young "moonlight" people? Because from the perspective of financial management, this financial arrangement only considers the immediate satisfaction, not the financial arrangement for maximizing the satisfaction of the whole life. The knowledge of financial management tells us that if a young man saves a part of his income, say, a quarter, and makes appropriate investments, his future satisfaction will far exceed the immediate satisfaction of giving up part of his consumption loss because of saving, but from the perspective of his life, his overall satisfaction will increase. Therefore, we say that proper savings and investment is a better way to manage money than the "moonlight" lifestyle.
Why do we encourage moderate consumption instead of blind saving? If giving up the current life satisfaction is only for the future financial security, then the whole life satisfaction is often not maximized.