Realistically speaking, why is that a problem? What is the point of money if not enjoyment? If these people enjoy it, what's wrong with it?

Mark finds $100,000 (something good for Mark), then finds out it's the inheritance of a family who's about to get kicked out of their house (label due to how it was made). Mark decides he should not keep the money because it belongs to the family (intellectualizing).

You're saying Mark should have kept the money because doing otherwise is intellectualizing.