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 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.
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.