has already said most of what I would have; you are inferring context by conflating my choice of phrasing with previous discussions you may have had with other people. Would it have helped if my example had been preferring DC to Helsinki and then Helsinki to the remaining two?
I used 2015 as an example because it was the most recent multiply-contested site selection vote (2016, with only two serious bids, was effectively reduced to first-past-the-post once the hoax/write-in votes were distributed) and as a demonstration of how IRV is not FPTP
because it allows second and later choices to affect the outcome (as, in the 2015 vote, it quite clearly did; FPTP would have elected Helsinki by a plurality).
This is not a thread on alt.fan.ranked-choice-voting, and so I wrote for a reading audience that may or may not have had experience with IRV and related systems in order to help them understand why ranking multiple options is important.
(As for that CGP Grey video you referred me to, I've already seen it. I've been a fan of his videos for a while now, and for that matter I've been using IRV and its cousin STV for years as both a fan voting for Hugos and Worldcon sites and as a resident of Cambridge, MA
which has used STV for municipal elections since 1939