The chart may not be accurate
The chart may not be accurate, I am not verifying its legitimacy, but you’re reading it wrong. The “compared to average” is not an average it is a multiple of the average. Say the average was 1% and your car had 5% go over 200k miles. The “compared to average would be 5x. Jumping to conclusions is a sure fire way to showcase arrogance and stupidity.
Also my 2011 prius has 140k miles. New brakes, struts, Lower control arms, and tie rods ends. She burns oil, 1qt per thousand miles (oil changes done every 3-4K, didn’t matter). And I only get 39MPG (used to be 49-51). I’d be surprised if I make it to 200k.