The devil will try to diminish if he cannot abolish. He will harass what he cannot extinguish.
Mary isn’t the same thing as some utterly ginned up goddess. Those following the “official” theology and not a completely uneducated viewpoint will be careful to ask Mary for prayers, not for acts that only the divine can achieve.
I can say one thing, however. If one of the most spiritually energetic figures of the New Testament, Paul, never let on in his epistles about praying to Mary... maybe, just maybe it didn’t HAPPEN.
And the Goddess was most certainly a demon (nephilim or the ancestor or descendant thereof).