i will give another example -- Christ is our Paschal lamb, 1 Corinthians 5:7
Exodus 12, Leviticus 23, Numbers 28 & Deuteronomy 16 aren't supposed to be "divided" away from us; they are supposed to be understood by us as speaking of Christ.
clearly no, we don't go to a physical temple and sacrifice animals for forgiveness of sin -- but why not? because Christ Himself has given Himself as our sacrifice for sin, once and for all. so it's not that Leviticus should be "divided" from us, but that Leviticus is rightly handled and understood as speaking of Him. that's not "divided" but revealed, it's cut straight.
if Paul thought the Torah was not for believers, that the feasts were not meant for a Christian audience, what is he doing teaching from them and using them as direct examples of the gospel, as though their testimony is witness of the death burial and resurrection of Jesus? clearly he doesn't think they should be "divided!" he thinks they are given to reveal and give witness of the Son of God, just as Peter says in Acts 10:43 -- oh wow! they're preaching the same thing, not different gospels! and they're both saying that all of the OT is preaching that very same gospel!
so it's a fundamentally different approach to "accurately handle" than it is to "segmentize" scripture, and the very same apostle who tells the young man in his tutelage to "cut straight the word of truth" is himself not compartmentalizing scripture, but using all of it as though it is for us, using all of it as though it is about Christ, using all of it as though every jot and tittle of it teaches the gospel when it's properly understood, when the veil is removed.