Any good crypto library will have a solid secure random source that usually combines entropy from multiple sources with a provably secure hash based mixing scheme.
Hardware RNGs can be one source, but no single source is trusted, and they're all combined in a way where even an intentionally malicious source is lost in noise and cannot actually determine output.
Hardware RNGs can be one source, but no single source is trusted, and they're all combined in a way where even an intentionally malicious source is lost in noise and cannot actually determine output.