I know this sounds like the way things should be built.

But the problem isn't why it couldn't be built. The problem is: Should we build it?

Do you really want to have atomic blocks on which we build everything on top?

Only to find out after years that there was a critical bug for years (see heartbleed iirc) in some absolutely critical code block that not enough people cared to review because everyone was like: surely, enough other people are going to review it, it's such important code!

And then everything is vulnerable at once. Reading about the history of heartbleed scared me so much, I literally have no idea how we even made it so far, lol

So I would rather not see such a future unless we really can proof that code is secure. But I don't see how.

You can imagine this problem to be related to bitcoin. Everything we build on top of bitcoin will fail if bitcoin fails.

Do we want to build our whole society the same way?

I am not sure yet, lol