It is though. Trump was already a cultural icon and a world famous multi-millionaire at this point. The idea that he went into a Tiffany's in the middle of the day and assaulted some plain-Jane looking woman in the dressing room would only be believed by a complete idiot. On top of that she doesn't remember the day, month, or even the year this happened. Finally, she waits 30 years to say something about it and it just so happens to coincide with Trump running for President.
I'll tell you what you won't admit. You know it's bullshit but you don't actually care. It has value as an accusation to lob at Trump. That's all it is.