They don't see how they've elevated her to a position equal to Christ.
It may explain why Catholic "Mary" replaces Jesus in so much of Catholic thought and writings.
Worth repeating: that they are unaware of what they've done and they they have elevated her to a position equal to Christ.
They have made dear, blessed Mary into a Demigoddess, with god-like powers, but approachable and able to wrap God around her little finger.
Well, they they have not fully elevated her to a position equal to Christ, but the objection to elevating her far far far above what is written (cf. 1Co. 4:5) of mortals including her, all egregiously extrapolated out of the relative little the Holy Spirit of Christ records of her. Being the God-bearer (which title they even shun in favor of the misleading "Mother of God") "according to the flesh" (as the Spirit of Christ is careful to clarify when speaking of Christ coming out from Israel: Rm. 9:5) does not require her to be sinless, anymore that her being sinless would require that of her own mother.
It is so bad that if you only want to honor Mary as Scripture does and contend against the hyper-adulation, then some charge you with "hating" the Mother of God!