Previously, due to the cognitive limitations of our brains, it was difficult to tell whether resolving a conjecture genuinely required years of dedicated effort, or if the answer was already hidden within existing human knowledge. Or whether a problem is just waiting to be searched out through ingenious or even brute-force means. With AI, we can now offload this search, especially across different areas of math, allowing us humans to focus our minds on discovering new mathematical structures and techniques.
Indeed, if one believes what Hilbert believed: we must know and we shall know, he should feel happy, as the belief has never been about who solves a problem, but about whether can advance our understanding of the universe. With the help of AI, we have a lot more possibilities.