As much as many Mormonic doctrines are.
Show us:
1.Even one example where anyone prayed to anyone in Heaven but the Lord, amid the approx. 200 prayers the Holy Spirit recorded for us in Scripture.
2. Any instruction on prayer to Heaven in which the addressee is anyone God, versus a created being in Heaven.
3. Even one example in which anyone in Heaven but God regularly hear and respond to prayers addressed to them, (elders and angels offering prayers in memorial as a preclude to judgment will not do), versus the Lord Jesus being the only unceasing Heavenly intercessor. (1 Tim. 2:5)
4. One example in which anyone from Heaven but God communicated with those on earth without both being personally present in the same realm.
5. One example in which earthly relations on earth have complete correspondence to those btwn created beings, in contrast to that not being the case.
6. Even one example of a common, necessary, fundamental doctrinal Christian practice for which the Holy Spirit does not provide even one single example, except by pagans in which it is condemned.
7. Even one example in which believers even sought the intercession of Mary on earth.
8. Even one example in which faithful believers kneel before other believers on earth in obeisance in sanctioned.
9. Why Catholics are exempt from the admonition not to think of mortals "above that which is written." (1Co. 4:6)
10. Even one example in which believers kneel before a statue and praise the entity it represented in the unseen world, beseeching such for Heavenly help, and making offerings to them, and giving glory and titles and ascribing attributes to such which are never given in Scripture to created beings (except to false gods), including having the uniquely Divine power and glory to hear and respond to virtually infinite numbers of prayers individually addressed to them
Which manner of adulation would constitute worship in Scripture, yet Catholics imagine that by playing word games then they can avoid crossing the invisible line between mere "veneration" and worship.
Moses, put down those rocks! I was only engaging in hyper dulia, not adoring her. Can't you tell the difference?
Caths should only do (and I should do more of) what Mary and every believer in Scripture did in praying to Heaven, which was to pray directly to the Lord, not saintly secretaries. But they must truly become born again for that.
Instead, Caths basically say,
As for the word that thou hast spoken unto us in the name of the Lord, we will not hearken unto thee. But we will certainly do whatsoever thing goeth forth out of our own mouth, to burn incense unto the queen of heaven, and to pour out drink offerings unto her, as we have done, we, and our fathers, our kings, and our princes... (Jeremiah 44:16-17)