1. If it costs $6-22 million to produce a paper that the brightest minds in maths can't understand and use, this trend will stop soon enough on its own.
2. Why are these minds complaining that there are no authors to discuss the paper with? There are OpenAI researchers to talk to. If they refuse, because they themselves don't understand, then don't bother with it? You're responsible for your time. Write a response on what's unclear, and move on. What's the point of whining about others writing things you don't understand? See point 1.
3. If LLMs can be used to solve problems, that leaves more time for mathematicians to come up with follow-ups. That seems a great way to speed up the field, no? Just be sure you understand the solution before expecting anyone else to spend time on reading it.