Provocative question, but what would be so bad about extinction actually? Personally, I'm interested in living a good life and for as many other people as poss

Provocative question, but what would be so bad about extinction actually? Personally, I'm interested in living a good life and for as many other people as possible (who are currently alive or are very likely to be born soon) to be able to do so as well. I honestly couldn't care less whether Earth in the distant future is populated by lifeforms that share some DNA with me or by other lifeforms that don't. Or to take the freak meteor you mentioned. Such an event would no doubt be horrible - but more because of the immediate experience of those people who had to endure it, experience nuclear winter, collapse of civilisation, ect. However if the meteor really managed to wipe out all humans then... what? There would be no one left to judge. Earth would go on like it did for billions of years before humans. On the other hand, why should we endure greatly reduced quality of life (through e.g. increasing effects of climate change) only so we get the economic output required to launch some rocket to mars and plant some DNA there? So why exactly the focus on the survival of something abstract like "the human race" instead of the lives of the actual humans?