You seem to be imputing motivation for using Rust, then criticizing them for making your assumption. If they had written a fuzzer in python, would you assume th

You seem to be imputing motivation for using Rust, then criticizing them for making your assumption. If they had written a fuzzer in python, would you assume they used python because they had the mistaken idea that a slower program would produce better results? It seems like a much more likely explanation is they know Rust well and it is their tool of choice. Another possibility is that a good fuzzer is non-trivial and they appreciate the compile-time checks offered by the language to avoid an entire class of errors.