This mischaracterizes the role of rigourous proofs in mathematical understanding. While undergrads and early grad students focus primarily on proofs, formalism recedes into the secondary role of honing intuition as mathematicians transition to their "post-rigourous" stage of development[1].
The importance of intuition in mathematics cannot be overstated. That's why people go to math talks even when the actual results are codified in papers. In a less formal setting, they get to pick the author's brain to learn their mental pictures and heuristics that don't make their way into papers. Those would be analogous to chain-of-thought traces and agent-to-agent messages for a computer generated result.
[1]: https://terrytao.wordpress.com/career-advice/theres-more-to-...