[gregmac]

My team doesn't really argue about points next to each other (on the Fibonacci scale) anymore, we just pick by majority and move on.

The conversation is meaningful when it's about 3 vs 8 because exactly as you say, there probably is some hidden complexity not everyone knows about, or sometimes some work has already been done or there's a framework feature that makes it easier than it seems.

But 2 vs 3 or 5 vs 8... this is explicitly designed to be an imprecise number, so let's not waste our time debating which one to choose.