There are other reasons why a project like Zig might not want to accept LLM generated contributions.
Zig, as programming language, has a multiplier codebase. A bug may affect a significant larger portion of users than most libraries or binaries will, as it's a fundamental building block of everything that uses Zig. Just that could be worth the extra scrutiny on every individual commit.
There's also the usual arguments: copyright ethics, environmental ethics and maintainer burden.
It might be one of the reasons they want to migrate to Rust, i.e. to handle many these memory related issues by the compiler.
Personally I used bun on a very few personal instances. But if you check issue reports, you will see memory bugs being reported say more than deno.
Zig, as programming language, has a multiplier codebase. A bug may affect a significant larger portion of users than most libraries or binaries will, as it's a fundamental building block of everything that uses Zig. Just that could be worth the extra scrutiny on every individual commit.
There's also the usual arguments: copyright ethics, environmental ethics and maintainer burden.