There is a huge jump from

AI solves math problems to

> If there are no humans in the field

Realistically, math will be done by well funded teams of people instead of cult of personality mathematicians.

Also, insights from scientific discoveries are for everyone. You do not have to understand the complex multi dimensional algebraic geometry of general relativity to appreciate that gravity bends time as well as space. You don't need to understand fifty years of linear programming research to use a modern solver.