Or they lost to me, and never figured out how to get around Bair.
Any Warios who think Peach will only bair him all day (or only has bair against him) don't know how the matchup works at all beyond a low level of play.
If they don't figure it out, I just keep using it and win *shrug*
Then you get people like toobusytocare with the "All Peach does is bair, so predictable!!1" (but still loses the match )
When they do figure it out, then we get interesting guessing games that Peach tends to win more often than not.