Quite possibly the most famous use of, "wherefore," is in Romeo and Juliet, and Shakespeare used it in exactly the fashion of the GP. In this case, instead of asking why he's a Montague, I believe the GP is asking why he has been forsaken with the absence of a Cowboy Neil option.
The comma clearly shows that girlinatrainingbra means “where”, not “why”: “where is the Cowboy Neal option?”
The original quote is:
“O, Romeo, Romeo! Wherefore art thou Romeo?”
Juliet is not asking where Romeo is—he's standing right under her balcony! She is asking why fate made him a Montague while she is a Capulet, since it is a deadly sin (in the eyes of their respective families) for them to love each other.
A few lines later comes another famous quote:
“What's in a name? That which we call a rose / by any other name would smell as sweet”
and she goes on to ask Romeo to change his name.