I just question the integrity and immutability of the data IA is archiving, that's all

You want to know why they'd tamper data?

https://seclab.cs.washington.edu/2017/10/30/rewriting-histor...

https://blog.archive.org/2018/04/24/addressing-recent-claims...

NSA already paid to back-door RSA, got caught shiping pre-hacked routers, can rewrite pages mid-flight with QUANTUM, penetrate and siphon data from remote infected machines.. what else could they do?

https://www.amnesty.org/en/latest/news/2022/09/myanmar-faceb...