1. There are no unicorns.... They do not exist.
2. AWALT may not be true. But EWALT (Enough Women Are Like That) is true, add #1. = AWALT is true.
3. All women are fundamentally driven by her emotions and her female nature. Female nature has been forged out over millions of years by evolution. Her emotions can be controlled, and her female nature can be suppressed, but both are always active. This is where "She's not yours, it's just your turn" comes from, sooner or later she will find another man she views as higher value than the one she has. Female nature says she will always be looking.
That should answer your question on "How could so many of us had the same experience....?"
Bundle up, boys, it's gonna be a long cold endless winter.