Many other professions are somewhat honest about their motivations.
Quants are open about that they just want to make a shitton of money.
The guys I know who work at OpenAI just want an expensive car and a hot wife to fuck.
Mathematicians(and many academics) however have long been hiding behind the guise of furthering human knowledge, understanding things, etc. Then a model does theorem proofs and suddenly there is chaos and the real incentives and motivations are put on display for the world to see.
This is a deeply cynical (not to mention, a touch misogynistic) take on human motivation. This might be true for your small circle of friends but I think it reflects your thinking a lot more than some deep objective truth about people and their careers.
See professor Williams' thoughts on a recent conjecture that openai proved: https://people.csail.mit.edu/virgi/thoughts.txt