I'm not sure this is true. Encoding theorems in dependent types takes a lot of expertise.
Even without the Lean technical details, a lot of math theorems just don't mean anything to most people. For example, I have no idea what the Navier-Stokes theorem is saying. So, I would not be able to tell you if a Lean encoding of the theorem is correct. (Unless of course, it is trivially broken, since as assuming False.)
Even without the Lean technical details, a lot of math theorems just don't mean anything to most people. For example, I have no idea what the Navier-Stokes theorem is saying. So, I would not be able to tell you if a Lean encoding of the theorem is correct. (Unless of course, it is trivially broken, since as assuming False.)