Having been the lucky one who got in via a loophole in the regs, I wholeheartedly agree that, as long as it's correctable to 6/6, eyesight shouldn't be a limiting factor to selection.
The RN accepted helicopter pilots with 6/18 when I applied, and the examining doc took some convincing, even after reading the regs. DCI came out when I was at BRNC, upping the requirement to 6/6. After 35 years and oodles of hours, eyesight hasn't been an issue.
Unless there is an unknown reason, I can't see why eminently suitable applicants should be rejected from the mil because of (correctable) dodgy eyesight.