Those companies and firms back Rust because it's memory safe without a garbage collector, and great for general purpose programming or systems programming. That's super important for everyone, but especially large companies working on high performance or mission critical software.

Zig is not memory safe so it's a non-starter for these things, and has not proven itself in the industry anywhere near what Rust has.

This has nothing to do with Rust being "corporate" or anything wrong with Rust.