Why is life programmed to survive?

[Yoo]

I have been wondering, why is life designed and programmed to survive? From our genes to our teeth, everything we have is in order to survive. This is also the case for plants, and every living being. We also know how this process happens from a biological perspective. Evolution, etc.

But now the question remains, why does life struggle to survive? This universe, or even Earth, does not care if there is life or not. And actually, chances are every life on Earth will disappear, as it has happened to 99% of all species that have existed. The Sun will eventually grow enough to absorb planet Earth, and then it will explode, making sure nothing will be left. 

I know this may be a philosphical question too, not only a scientific one. But as far as I know this question has not been answered. On the big scheme of things, we does life fight to survive?

It depends on what you mean. 
1. Why do living things "have a will to survive"? Because every ancestor they have were the ones that survived long enough to reproduce. Why did they do that? Ultimately, because of chance. Some animals just so happened to be better at surviving and reproducing, because of a difference in their DNA. And of course, that caused those individuals to be more successful at reproducing, thus having more offspring, thus taking over the population. In time, the initial improvement one individual had, became the standard within the population, because it had spread. And if an individual didn't "have a will to survive", he would leave no descendants, therefor the ones that did have a will to survive would outnumber him. By a lot It's really the basics of natural selection.

2. Why does life, as a whole, "have a will to survive"? Because every single life form has that will. If every single component of what we call 'all of life' has a will to survive, the sum of those components probably seems to have that will as well. But it's just an incidental result of natural selection, because that doesn't work at that level, only at the level of, ultimately, genes.