That far from charitable. My arguement is:

A) According to the letter, mathematicians most value:

- mathematicians developing their mastery

- developing mathematics that provides insights and can be eventually synthesized down conceptually to textbook theories

- caring for students and fostering their growth

- human mathematicians getting credit for doing important work

- etc.

B) According to the letter, AI labs aren't trying to do any of these.

Conclusion) The result is that AI is not competing with them in their goals of

- mathematicians developing their mastery

- developing mathematics that provides insights and can be eventually synthesized down conceptually to textbook theories

- caring for students and fostering their growth

- human mathematicians getting credit for doing important work

- etc.

The upshot is that mathematicians still have autonomy to pursue those goals, develop mastery at achieving those goals, and remain part of a community of others pursuing them. The only mathematician who loses these sources of motivation is the one who embraces the use of AI and personally abandons those goals.

The real crisis will come if AI does try to align itself with the goals of the mathematical community and if AI turns out to be better at developing insight, training students, writing comprehensible textbooks, etc. Then the top mathematicians will truly provide little value to their community.