or it might just have to do with values and what feels rewarding (making a family is extremely rewarding on a personal level). IME, people who grow up in a really close, non-dysfunctional (relatively speaking, because we're all fucked up) family tend to place a lot of value on creating the same atmosphere. There's nothing wrong with it. Dreams and aspirations are deeply personal and yours probably seem stupid and wasteful to a good amount of people too.
Edit: And IMO, people who aspire only to be rich and successful with nothing else in mind are living a more wasted existence. But to each his own.