> I think that is horrible for society.

Why do you think that?

1. Society has (implicitly) invested resources in order get these individuals to a place where they can push and prod at the boundaries of mathematics. This investment is lost.

2. The majority of mathematicians are passionate about what they do, which typically means higher productivity. Forcibly transferring them to a different field means we lose that productivity.

3. Aspiring & passionate mathematicians will see how the field is impacted and will end up doing something else instead. This is not just a loss for the field, but also a loss for humanity because that person could have ended up being the next Terrence Tao.

Taken together, it is hard to foresee what the 2nd and 3rd order effects will be, especially because of how pure mathematics is a “trickle down” field where advancements find practical usecases later on in the sciences and in engineering.