tl;dr: Timothy Gowers explains why he declined to sign a letter from 25 Fields medallists warning that AI's rapid problem-solving threatens mathematical understanding. He argues the letter overweights conceptual understanding relative to problem-solving, and that a flood of AI-generated results, while imperfectly digested, would likely increase both the volume of properly digested mathematics and the choice of results to study. His real concern is social: that young people will lose motivation to pursue math PhDs, funding will dry up, and the human mathematical tradition may not be transmitted to future generations.