That's a very narrow and technical person's point of view.
You might need it open source, the majority of the world doesn't care, like they don't care Windows is closed source, or like AWS is a "cloud" running somewhere else. Both of them are building blocks that made "the world better and more robust".
Users might not care but the people building such things (us) do care and must care so that we can provide a product for those users which does what it says.
If you don't care that's fine. You go run the Claude Code "sandbox" and let it put your entire home directory on a public pastebin. Anthropic guarantee it will exfiltrate your data in the most secure way possible.
The rest of us want verifiable sandboxes which we can fix if they are wrong.
You might need it open source, the majority of the world doesn't care, like they don't care Windows is closed source, or like AWS is a "cloud" running somewhere else. Both of them are building blocks that made "the world better and more robust".