I get it, but if we're building things for others to use the elegance of our solutions doesn't matter. What matters is things like the efficiency, the experience of using it, not writing it. And I think browsers should serve the end user, not the developer. If we sacrifice some elegance for security that seems like a win for the user. Even if we lose some of the elegance of the abstraction, that's not what it's about.

Of course everyone is free to create things they want with their own abstractions, but let's not pretend that it's an optimal solution. Elegance and optimal are often at odds.