I see... I thought it might be that way, considering how personal the ability seems.

[At least that was the impression the tenor of their conversation had given him, not to mention what he'd picked out of books.

There might've been ways to force such ability, but rather like the Quinx surgery, Haise doubted he'd have much taste for it. Often such measures came with their own risks]

Where I come from, we had innovations of our own to make up for lacking capabilities... So it seems to be a similar principle.