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.
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.
Backblaze's personal backup has a feature to use your own private key to encrypt your backup data before transmission.
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)