Only two 737 MAX have ever crashed (both outside of the US), so the 3.08 figure is an extrapolation, not necessarily reality. After the software update it might have gone another 500K flights (or more) without a crash, leaving the figure at 2.0 (or smaller).
Let's say you need to travel from NYC to San Diego.
Let's assume a car death rate of 1.25 deaths per 100 million vehicle miles (a figure that popped up in Google). But that includes motorcyles and pedestrians, so let's play it safe and call it 1 death per 100 million miles.
By now we are comparing apples (chance of death by trip) to oranges (chance of death per mile traveled) but let's press on.
Distance from NYC to San Diego is 2,800 miles. So your chance of dying en route to San Diego is about 1 * 2,800 / 100,000,000 or ~30 in a million chance if using a car. Whereas with the MAX it is ~3 in a million (if you take a direct flight), or an order of magnitude more safe.