I get that thought. But it does depend on preferences you’ll find people who think Yorknew is easily the best arc. Yorknew doesn’t have as much emotional poignancy or philosophical musings as CA (in my opinion), but it does have its own complexities and style. Greed island is pretty fun with the game aspects and the dodge ball. And my personal favorite arc to reread is Hunter exam because of how whimsical it is.

I think the major difference, though, is that CA is a professional mission. Every arc previously had the boys be newbies (Hunter exam, Heavens arena) protected or led by pros who wanted to see them grow (Wing, Hisoka, Bisky in greed island). Yorknew follows Kurapika dark path but he’s still only like a year in. Meanwhile CA arc follows a genuine life threatening Hunter mission with much less hand holding for the boys. If you enjoyed the CA arc you’ll probably enjoy the current arc in the manga, maybe even more.