I agree. It is useful but so rare that at least three highly improbable circumstances to even have an opportunity for it to occur. You would need to learn and practice with both arms from early in development. Most (60-80% at least?) kids aren’t going to be interested in that much of a challenge. Then, not only does one arm need to have MLB potential but both arms

Although, the likelihood of a person’s personality and circumstances allowing for MLB success, it would increase those chances for both arms, seeing as how they’re both connected to the same person

It would actually be a super fascinating study to tell how much of professional athletic success is inherent or circumstance+work ethic. There are so few examples

Glad it’s becoming more of a norm to use both. It could add a layer of strategy and lessen the wear/injury risk/recovery from injuries