I've seen this attitude before. In that specific case, someone tried to not depend on the signal_hook crate and manually (unsafely) implement signal handling… without knowing that there's a ton of pitfalls to it.

(The signal_hook crate even contains documentation on those pitfalls. https://docs.rs/signal-hook-registry/1.4.1/signal_hook_regis...)

I mean sure, reinvent the wheel. But it might do good to at least have an inkling what those 105 dependencies for your http listener did.