"You can also browse and install software releases directly from the Internet Archive without leaving the app. "
That's a fine line being walked there. If they are worried about rights issues and not including the bundles, this seems like a risky FU by building this feature in directly. The part about using bundles you may have without asking questions of origin is fine. Otherwise, why not just include the bundles?
This is pretty well trod legally. By the user taking a specific action, it makes the user responsible. Comma.ai uses the same technique. Technically their self driving hardware comes with no software. You have to click a button and point it at their GitHub to get the software on it, but it's automatic after that.
From a pragmatic perspective: Berkeley Systems went through a long chain of acquisitions in the late 90s/early 2000s and eventually ended up under Vivendi, which hasn't done anything significant with the rights since a Flying Toasters themed J2ME game [1] in 2006. I doubt very much that they're going to do anything.
[1]: https://www.youtube.com/watch?v=ESZSufoTPBs