Did we read the same article?
You're complaining about an optional back-up
service. No data is being "collected," you're giving it to them (in an encrypted form) to store on your behalf. How else would a backup
service work?
If you don't want to use the cloud version, there's a feature to store backups locally on-device.
Signal blog: https://signal.org/blog/introducing-secure-backups/
HN: https://news.ycombinator.com/item?id=45170515
