That was an important asset for a mathematician in his time but is of little use today. No matter how good a calculator you are you can buy a better one for a few dollars. Inevitably this lowers the value of those skills while opening new possibilities to those with different skills. We are just beginning to understand what can be done and still view this opportunity too narrowly. We want to automate mathematical proofs so we try to create completely automated theorem provers.
Technology is far from being able to replace the human mind.
The enormous calculating power of modern computers may soon be sufficient to defeat any human chess player with the brute force methods that such chess programs use. That is not the way to make the best chess player. To do that combine the special skills of the computer with the subtle skills of the human. Let the human use a computer program to aid play just as you let a student use a calculator during a physics exam. Finding the worlds best computer aided chess player may not be important to cultural development but effectively using the computer to amplify human mental skills is.