Debian doesn't go far enough on that point, the folks at GNU Guix and Bootstrappable Builds are getting to the point where they can build the entire distro from source starting with only ~500B of manually written machine code.

https://bootstrappable.org/ https://guix.gnu.org/en/blog/2023/the-full-source-bootstrap-...

Debian is enough for me in this regard. I am not chasing absolute perfection.