No. Homebrew should use C++ and C++ is beautiful than that bogus Rust. I'm willing to war with Rust Cultists. Billion dollars would be spent on Ads in coming weeks. I will start from YouTube to show how cool is C++
Docker use shared resources like Kernel. Linux Kernel is big ugly C mess (Compared to includeOS) and probably one can find a good enough exploit for the kernel then escape the Docker.
That's and VM provides much better security. Well, VM escape exploits exists but they are at least much harder than say a Docker level escape.