The endavour doesn't have much value at all except as an experiment how well translating C code to Rust via LLM works (but you don't need an LLM for that either, C2Rust was already a thing).
Also, the C version of Quake compiled to WebAssembly and running in browsers is just as "safe".
What about what about people learn and possibly the fun they get during the process?
Sure this project won't save humanity or optimize some KPI pleasing some obscure hierarchy.
Let people have fun, as long as they don't hurt anyone personally I'm fine with it and even I'm happy learning someone had some cool moments.
But C isn't as nice to work with. Maybe OP just thought it was fun to see it take shape and wanted to share it. Why do any sort of little side project like this at all? Just seems like everyone is judging this too harshly. If an LLM is reasonably good at this sort of thing, and you think it would be cool to see Quake written in Rust running in the browser, I say just do it and have fun and don't be shy about doing show and tell about it.