You'd be betting wrong. Even a casual skim of the Archive's blog will show that the Wayback Machine isn't their primary focus, and hasn't been for ~20 years. It may be their most important aspect to you, but the Archive is comprised of a large network of people working together to make all kinds of information available on the internet that wouldn't otherwise be accessible. To those people, those repositories are far, far more valuable than the Wayback Machine (and I promise they care a lot about this issue -- possibly more than HN does, given the timbre this topic has received here).
What I'm saying is that the things the people who work at Internet Archive care about may not be the same as what end users care about. I think the end users care mainly about the Wayback Machine.
There is nowhere else that you can browse for example a Byte Magazine from 1984 (https://archive.org/details/byte-magazine-1984-12/). This is what the Archive is about, from their perspective -- along with music, video (including broadcast video), and a whole lot of other projects: https://archive.org/projects/