I've been to plenty of conferences over the years, and I never really knew who was a "keynote speaker" or "only" a "speaker". Does anyone pay attention to this? You give a talk. People show up. They clap at the end. Does it really matter what some title on some conference website is? The communication was perhaps a bit more confusing and hectic than it should have been, but does that really matter? Is that really a b…
Almost all of them had keynote speakers, who received a prominent spot, usually in the morning and on multi-tier conferences the only talk scheduled at that time slot. Based on content of most of those talks the expectation was to take a wider or deeper or just different look at our fields and not mainly present a smaller idea or solution.
But it also doesn't matter if you or I personally do or don't care about distinction. There is one made clearly and as soon as it is made, there is an implicit promotion or demotion depending on which way a person is being moved and one should have very good reasons to demote anyone publicly as they did here.