Why do Catholics adore, worship and deify Mary so much?
OP ^
* First of all, Catholics will deflect from your point of WHY, to saying it’s merely adoration not worshiping.
Irrelevant since Catholics are simply individual persons, who all are well aware of the statues of “Mary”, and bow before the statues, lay trinkets around the statues, kiss the statues, pray before the statues;
saying whatever in their own prayers; be they asking or worshiping.
As far as WHY...because 2,000+ years ago Gentile men began being Appointed to early Church positions. As the Apostles were dying off, the Gentiles began creating non-Scriptural Traditions increasing the Traditions year by year, elevating their own Positions, as pseudo demigods, (which is easily observable to this day).
Consider ancient days of the common lowly ignorant nobody, being welcomed in beautiful Church, in the presence of some pseudo demigod, with a throne, crown, elaborate attire which
that notices the nobody, a nod, a smile, a greeting, a touch...
the ear will yield, the body will mimic.
Nothing new, “importance” by association, and continues to this day.