Guys in this quote chain, why make it like we have to privately send the code to OP, when it can just be uploaded to Github as a public proof and so that future people can benefit from it?

I see no benefit in spending a lot of energy making something only to hide it from the public. Just look at how many threads that exist here offering bounties to decode/decrypt/unscramble/brute-force their private key and imagine how many less threads like those would be made if the existing problems were solved and the code made available.