Which is because Catholics insist that earthly communication or btwn those in the same realm is the same thing as praying to God in Heaven, which is the only prayers we see by believers in all of Scripture, and which is the issue.
The saint carried the request to heaven, the one who prayed remained on earth and called out to the saint, and the prayer was answered from heaven.
And Elijah took his mantle, and wrapped it together, and smote the waters, and they were divided hither and thither, so that they two went over on dry ground. And it came to pass, when they were gone over, that Elijah said unto Elisha, Ask what I shall do for thee, before I be taken away from thee. And Elisha said, I pray thee, let a double portion of thy spirit be upon me. And he said, Thou hast asked a hard thing: nevertheless, if thou see me when I am taken from thee, it shall be so unto thee; but if not, it shall not be so. And it came to pass, as they still went on, and talked, that, behold, there appeared a chariot of fire, and horses of fire, and parted them both asunder; and Elijah went up by a whirlwind into heaven. And Elisha saw it, and he cried, My father, my father, the chariot of Israel, and the horsemen thereof. And he saw him no more:
Well now that's a new desperate attempt, for it no more shows a believer praying to someone in Heaven then the other attempts to read this into Scripture. For the simple self-evident fact is that the only request that was made, "let a double portion of thy spirit be upon me," was made while both were on earth.
. Nor is the exclamation as by Elisha as he saw Elijah ascend, "My father, my father, the chariot of Israel, and the horsemen thereof" a prayer to him in Heaven.
And there is nothing about taking this request to Heaven, but instead as a prophet Elijah foretold that Elisha would receive the double portion of his spirit "if thou see me when I am taken from thee." The request was to Elijah (who had the power to bind and to loose), as one with the power to convey the Spirit, and there was no need or inference of any prayer being taken to Heaven, but only a prophetic promise. Moreover, nowhere are prayers show being actually taken to Heaven by anyone from earth.
Yet somehow you must read this like "if thou see me when I am taken from thee, i shall make request for you in Heaven and it shall be so," which reading is compelled by the need to compel Scripture to support what is nowhere teaches, despite prayer being such a basic common practice that the Holy Spirit provides approx. 200 prayers to Heaven, and despite only pagans being shown to pray to created beings in Heaven, and despite and manifesting the division btwn Heaven and earth with only God being shown able to hear and respond to all prayer from Heaven.
By desperately trying to read into Scripture what the Holy Spirit could have and would have easily exampled but does not then you insult Him!