This is not about creating one’s own Bible. Jeremiah had trouble with priestly class of his time because he accused them of fabricating things as scriptures. (Jeremiah 8:8) Because of the way he was persecuted by them he called Pazhoor (priest) “as terror on all side.” (Jeremiah 20:10)
Interestingly, 1 Thessalonians 5:21 says we need to choose from the Scriptures what is only kalos(inherently and intrinsically good) which means many verses are weeds as implied by Jesus in his famous illustration of the weeds. (Mathew 13:24-30) I have no problem in identifying what is inherently and intrinsically good.