In a vacuum, it doesn't. God the Father is not male or female.
But when we talk about things, we need to make sure that what we say reflects the proper way to think, and words have both proper meanings and social connotations. Most people (perhaps all people?) can't think in abstract terms about things. So when we import words to describe God, even absolute terms like Good and Truth, we have to remember we're creating posits or constructs that are not themselves correct. Our words underdefine truth by definition.
With that in mind, perhaps a better question to ask is -- why have we traditionally spoken of God in the masculine? Why have we traditionally spoken of the Church in the feminine?
And the truth is that Christianity teaches unequivocally that Jesus Christ is God. So, as far as God is either male or female in a binary way, He is male. (I have to temper this by saying that the Fathers are clear that his male-ness is an attribute of the Incarnation of Christ, and not the Godhead.)
None of this is new - you can read a very exhaustive treatment of the subject of the nature of Christ's incarnation vs nature of God in St Ambrose De Fide Book III --
here. "But the word
man connotes sex, and sex is attributed to human nature, but never to the Godhead."
The Fathers also frequently used female metaphor and imagery of both God the Father and Christ Jesus, such as Christ being begotten from the "womb" of the Father. Both St Clement and St John Chrysostom speak of Christ as both mother and father to us. The term "spiritual milk" is frequently used to compare the tenderness and love of a mother nursing an infant to Christ's care and devotion to His people. But these are never ascribed to the Godhead as anything other than icons which represent spiritual realities.
In this day and age I would be more inclined to question the reasons and motives for referring to God in female pronouns than whether it "matters," if that follows?