That's somewhat uncharitable. patchelf, for example, is one tool developed by NixOS which is widely used for reproducible build efforts. (although I don't know concretely if Debian uses it today)
patchelf is not really widely used for solving reproducible builds issues. It's made for rewriting RPATHs which is essential for NixOS, but not something you would be seeing in other distributions except for when someone need to work around poor upstream decisions.
