As far as I understand it, nobody is disputing the correctness of the Lean proof, or that it proves the conjecture it actually claims to prove. That's sufficient to consider the problem "solved". The natural language proof is a "nice to have".
that's not the claim. the formal statement of the problem for the NS proof was written by humans not autoformalized.
https://github.com/google-deepmind/formal-conjectures/blob/8...
Maybe read the comment before replying, at a minimum.