I keep a list of ridiculously failed predictions, and this goes into it.
Can I ask you to be more concrete? What does "math is toast" mean to you?
Computers have proved stuff people couldn't since at least 1976 when Appel and Haken proved the 4-color theorem.
My claim is that in 15 years an AI system will be able to prove it from first principles for under 100 dollars. That would render us normal mathematicians toast.
The 4 color theorem was proven because humans actually did the math and discovered a way to simplify the problem enough for them to write a program that proves it. The proof wasn't discovered by a computer. The proof was discovered by the people who wrote that program. There was no machine learning involved.