OTOH, family usually can't afford to lose what they give. They make emotional decisions, not financially rational ones.
If a CEO can't distinguish those entire distinguish those entirely different cases I doubt their financial acumen. You go to VC for moon shots, to the bank for proven business models, and to family and friends to build a family 'lifestyle' and asset heavy businesses (asset heavy so you can recoup some of the money if your business fails).
No one rational should believe that their startup will succeed no matter what. We know, with certainty, that it almost certainly will fail. It's a flutter - a bet on a fabulous future (fabulous in terms of success, making a difference, huge wads of cash, whatever). If VCs expect that kind of naivety, well, you get what you pay for. How many other ways will that CEO be naive?
If they expect someone else to do their job, I wouldn't want anything to do with them, anyway.
"You are willing to lose my money, but not your friends or family?"
"Yes. Because if I asked my family to fund a business venture, it would be something bland, low-risk, and low-return. Exactly the kind of things you guys can't stand funding."
It helps you determine how much of your bankroll you can wager depending on (1) the odds, and (2) the size of your bankroll. It's the same reason why you shouldn't (mathematically) play the lottery (when it's expected value is actually positive) unless you're already filthy rich. The same math applies for hyper-risky startup investing.