Why is survival of the fittest misleading?
Similarly, it is asked, why survival of the fittest is wrong?
While the phrase "survival of the fittest" is often used to mean "natural selection", it is avoided by modern biologists, because the phrase can be misleading. For example, survival is only one aspect of selection, and not always the most important.
Similarly, why is the phrase survival of the fittest somewhat misleading?
It implies that the best possible organism will evolve. Based on what you know about resistance to infection, why are some people resistant to HIV? They can't be infected with HIV even when exposed.
Natural selection applies to humans, yes. “Survival of the fittest” doesn't apply, it's a bad statment. At no point does only the fittest survive, since that would mean the end of all species. Everyone who is fit enough survives.