Then it's no longer just your data. Someone else now also has a copy. How do you know they don't leak it or provide it to someone? There's value in hhavingyour data only local with some off-site arrangement.
Backblaze's personal backup has a feature to use your own private key to encrypt your backup data before transmission.
I trust Google and Apple to secure my data more than I trust myself.
I trust Google to randomly lock me out because their stupid AI determined that I'm a suspicious geek instead of a normal person. It's happened before, it will happen again.
Very secure but not in my hands. No thanks.
If the government wants my data, they can just raid me and take my home server. I trust that google can secure it from random hackers better than I can.
Arq Backup will encrypt your data (supports a bunch of different backends Google, AWS, etc, including your own)