Exactly. It's enormously insecure unless you can somehow control the next tenant or you actually think the least-enforced crime on the planet is going to stop people from invading your privacy.
If you are worried about Google kicking you off of the platform you should be terrified about what your landlord can to.
Most evictions are proper. Most tenants don't fight back, regardless. To be clear my complaints about mail are not about protecting well off yuppies who are going to be suing their landlords for improper eviction.
Many people are housing insecure, disabled, homeless, etc. You're basically removing all of these people from the system.
The issue isn't who owns the mailbox. It's whose mail is in it. You are absolutely allowed to open a mailbox with someone else's mail (even if it's extremely sensitive). It just needs to be your mailbox.