I've no ball in this game either (!), except that varicocele is an occasional cause of male infertility. After my initial lab testing, off he'd go to my neighborhood urologist.
I'm a bit with Radgirl here: never saw it be a major issue, the guys didn't moan any more than usual, and we frequently got our desired result. I'd be surprised if the aviation folks made more of varicocele/hydrocele than just a postop recovery time.
I'm not surprised, though, that high tech gets involved now, especially with recent reports of the decline in sperm counts these days.