Jubilees & Jasher----Huge Discrepancy in Description of Cain's Death

Could this be why the apocryphal writings were left out of the Bible?

The Book of Jubilees records that Cain died when his house of stone fell on top of him, thus fulfilling God's command that "by whatever way a person causes the death of another shall that way be rendered unto him". The writer records that Abel was killed by a blow to the back of the head with a rock.

The Book of Jasher, however, records that Cain was killed when he was mistaken for some wild game as he walked toward Lamech and his son, Tubal-Cain. Lamech drew his bow on the urging of his son and shot Cain full of arrows.

"And Lamech was old and advanced in years, and his eyes were dim that he could not see, and Tubal Cain, his son, was leading him and it was one day that Lamech went into the field and Tubal Cain his son was with him, and whilst they were walking in the field, Cain the son of Adam advanced towards them; for Lamech was very old and could not see much, and Tubal Cain his son was very young.

27 And Tubal Cain told his father to draw his bow, and with the arrows he smote Cain, who was yet far off, and he slew him, for he appeared to them to be an animal.

28 And the arrows entered Cain's body although he was distant from them, and he fell to the ground and died.

29 And the Lord requited Cain's evil according to his wickedness, which he had done to his brother Abel, according to the word of the Lord which he had spoken.

30 And it came to pass when Cain had died, that Lamech and Tubal went to see the animal which they had slain, and they saw, and behold Cain their grandfather was fallen dead upon the earth.

31 And Lamech was very much grieved at having done this, and in clapping his hands together he struck his son and caused his death."