Right if you know what it's going to be about, abstract and figures on top, agreed (and titles in the ML domain go a long way it seems). We often read papers in a very wide range of domains and applications and well-written intros are a very good parameter to decide what will be read or not, I suppose for people writing overarching reviews it tends to be the case too.

I would say though the intro is the most important part. People with little time will read only the intro, especially the last paragraph of it, to get an idea of what the authors wanted to do and why, and read the rest only if really interested. This meaning it should be the part written with most care and clarity.