Um, so? The fact that Zig did a boatload of extra work due to path dependence is true. However, this in no way contradicts that self-hosting via WASM/WASI is

Um, so? The fact that Zig did a boatload of extra work due to path dependence is true. However, this in no way contradicts that self-hosting via WASM/WASI is likely a far better idea than maintaining two complete compilers in different codebases and languages solely in order to bootstrap. In fact, nowadays, someone building a new language and compiler is probably better off targeting WASM/WASI before any other architecture.