There's a lot of difference between the planet ending in 4 billion years, and widespread famine in the next 100 years. It's sort of similar to somebody saying

There's a lot of difference between the planet ending in 4 billion years, and widespread famine in the next 100 years. It's sort of similar to somebody saying "hey, you're bleeding really bad, maybe we should get you to a hospital," and them rejoining with "nobody lives forever." Cool if you think you're action movie star, but stupid in real life.