Survivorship bias might be the most misunderstood bias. Not every flawed argument about survival are the result of survivorship bias, and not every example of survivorship bias is about literal survival.
Survivorship bias is a kind of selection bias. It happens when we draw conclusions based on the "successful" cases that made it through a visibility filter, while ignoring information about the cases that didn't.
This kind of argument often gets mislabeled as survivorship bias:
"Car seats are unnecessary. My kids never used car seats, and they survived."
Information about kids who weren't okay is not less visible (and is actually probably more visible because it is newsworthy), so this is not survivorship bias. It's the anecdotal fallacy, as it draws a sweeping conclusion from a personal story.
In some famous examples, the filter *is* survival (e.g., the famous WWII planes example), but not always. Here's a non-survival example of survivorship bias:
A teen scrolls through social media and thinks, "Most creators I see have a huge following. It must be easy to become an influencer." But successful creators are more visible than less successful ones. The creators who don't gain much of a following are also important evidence, but they're just much less likely to show up on your feed.