That's why it's not a no-tolerance policy. But, you will probably find that some people tend to "attract" such external events. Because they don't leave enough

That's why it's not a no-tolerance policy. But, you will probably find that some people tend to "attract" such external events. Because they don't leave enough time to account for any externalities. Or, in this particular case, maybe they actually are a bad driver that does not know routes good enough to avoid anticipated traffic patterns. And so on... If Uber really cares about why the service was bad, they can always break out multiple yes-no questions. (They probably don't, though.)