You accidentally conflated "conference" and "paper" which is true in computer science and also relevant to other fields. The crux of the problem is that almost

You accidentally conflated "conference" and "paper" which is true in computer science and also relevant to other fields. The crux of the problem is that almost no one reads papers. People get exposed to ideas at conferences, and conference organizers invite the people that wrote the seminal papers many years ago to be the keynote speakers. Even if a paper is cited, it is usually because they saw the author speaking at a conference.