Is some part of the Bible more important than some other parts?

Yes, 1Co 15:

3 For what I received I passed on to you as of first importance: that Christ died for our sins according to the Scriptures

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Mt 22:

37 Jesus declared, “ ‘Love the Lord your God with all your heart and with all your soul and with all your mind.’ 38 This is the first and greatest commandment. 39 And the second is like it: ‘Love your neighbor as yourself.’ 40 All the Law and the Prophets hang on these two commandments.”

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However, all parts of the Bible are important. 2Tm 3:

All Scripture is breathed out by God and profitable for teaching, for reproof, for correction, and for training in righteousness.

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Different parts of the Bible carry different kinds of importance with respect to

1. teaching
2. reproof
3. correction
4. training in righteousness
5. etc.

Different passages belong to different genres, carrying different purposes. E.g., 1Ch 1-9 contains mostly names of genealogies. With respect to practically training our sanctification today, it is not that important or relevant. However, by tracing the lineage from Adam to David and beyond, the passage highlighted the continuity of God's redemptive plan and special covenant with the Jews.

Is some part of the Bible more important than some other parts?

While all parts of the Bible are inspired and valuable, certain passages are regarded as more central or significant in terms of theological themes, Jesus' teachings, and the overall narrative of salvation. Understanding the Bible requires a nuanced approach that considers context, genre, and the principles of progressive revelation while recognizing the importance of the entirety of Scripture in shaping faith and practice.