That’s like skipping to the end of an important novel and thinking you got something out of it.
The issue is that the auto-formalization step itself is not trivial. There is no formal verification which proves the translation correct, so it is up to mathematicians to hand-check the formalization to make sure it’s saying the same thing. Unfortunately, this problem is undecidable in general.
We’ve already had a paper showing that auto-formalization can’t be trusted implicitly [1], so a GitHub repo of a bunch of Lean code can’t be trusted to prove what the title claims is being proved.
Wasn't it just a few years ago that there were all sorts of apps ("Blinkist" ?) being pushed hard that did just that: give you the TLDR on some publication so that you could pretend to have read & understood it?