Well sure, if you’re going to construct a scenario where a credit score hit will have no impact on someone because they have no need for credit in the next decade, then they can certainly go ahead and ignore bills.

You’re making a lot of assumptions though. What if they don’t own a house yet? A bad credit score will make it harder to get one, increase the interest rate if they can even get approved, and also make it harder to get approved for a rental lease too. Or maybe this person is all set like you describe, but they want to guarantor a loan or a lease for one of their kids? I think credit scores are a borderline scam, but it’s hard to avoid relying on them for one thing or another for most people.

Sure, people can roll the dice if they want. It might work out like it did for you. Or they could end up with an unremovable delinquency that gives them poor credit for years. Unless you have data to back it up, I wouldn't be telling people that the risk is low based on a single experience you had.