I'm not spreading FUD. That decision was made in 2018. At the time of Cydia's release, in 2008, it was a violation of the DMCA. You can't apply a ruling that happened 10 years later to argue that.
The ruling also just makes it explicit, the DMCA already doesn't cover things like jailbreaking because they don't relate to copyright, and do relate to the user enabling interoperability of their device with legally obtained software (17 U.S. Code § 1201 (f)). These rulings are not proclamations in contrast with the law, they are bound by it and must be valid interpretations of it. Apple's attempts to classify it otherwise were a clear attempt to abuse copyright law and were rejected as illegitimate.
You clearly do not know what you are talking about.