I’ve always argued that the US is the most powerful passport despite not granting access to the most countries for one simple reason: it’s one of only half a dozen passports that lets you visit the US visa free.
That is just false. EU passports can travel to USA Visa free and that’s 27 countries right there.
edit: Oh unless you count ESTA as a type of visa. You have to fill out a 5min always-approved form online.
https://www.passportindex.org/comparebyDestination.php?p1=us...
It's less weird if you know that the three Pacific island countries were formerly part of the Trust Territory of the Pacific Islands which was administered by the US for decades following the Second World War and today have Compacts of Free Association with the US.