This is a great question. I am not a mathematician but I've had similar questions about my own field (CS/Elec) as well.

I have always felt that a huge amount of brain power has to be expended in understanding the jargon and getting used to the machinery. Once we get past that, what people would think are highly challenging subjects become rather simple and logical. An analogy I like to use is old people struggling with simple tech tasks. I remember an uncle of mine who approached me to fix their laptop which wasn't connecting to the internet. Turns out the laptop had not been booted in a while and the public certs shipped with the machine had expired. Said person is a highly accomplished person in their field but was helpless when it came to this task. After I solved the issue, the uncle was eager to know what the problem was and I tried to ELI5 it but to no avail. It is possible I did a really bad job of explaining it but there was too much basic machinery to cover. Why is there a public and private key, what is symmetric/asymmetric, why do certs even expire etc. I couldn't even touch on the foundational math underpinning all of it so I left him in a confused daze.

To any SWE, all this is table stakes but for non-tech people it is way too much jargon. Today, I'm confident my uncle could prompt his way to a working understanding of PKI - heck maybe even some aspects of cryptography and prime number math that makes it work. This is where I see LLMs making a massive difference - they can crunch a massive amount of jargon and leave only the actual trick/idea for you to understand.

This is also what people like Szegedy and Tao have also said - LLMs will make math closer to what SWE is - a lot more people doing it in workmanlike fashion rather than a small community writing papers. At one point, dynamic programming was some research topic that Bellman worked on and now every 20 year old works on tens to hundreds of these problems in the hopes of cracking a job. But I'm sure the Math field will go through some turbulence and I wish them the best. There will always be a need for SMEs who deeply understand a subject and can come up with interesting problems.