I'm surprised no one mentioned the most obvious:
History only remembers the victors.
I can't tell you how many times I've brought up Jans Torsen, the fallen Jedi who saved a galaxy, or the adventures of Tykfal and Banarak in the Wildlands... But I've probably never once mentioned anything about a little wildelf campaign that ended in a
TPK after two sessions against some basic orcs.. Nothing special, just bad rolls.
Players will talk at ends about their awesome games, but rarely mentioned the failed campaings that died out after a session or two.