You guys are just repeating the same thing over and over again.
If you actually engaged your brain and tried to address what has actually been said many times already, we'd maybe get somewhere.
Why should any organism survive or fight for survival or get selected at all?
Completely arse about face. Things are selected exactly because they are better at surviving and reproducing. The first replicators didn't "fight for survival", but every trait that aids survival would survive better and therefore dominate the population. The "fighting for survival" or "survival instinct" would be built up one tiny step at a time, each one slightly better at survival.
The
absolutely inevitable result of natural selection is that everything is good at surviving (in the context of their environment) and that means things that "fight for survival" or have a "survival instinct". Those things are the
result of variation and selection, not its input.
Why are survival and reproduction at all important?
They aren't. It's just what
inevitably happens when you get replication with inheritance, variation, and limited resources.