I sprint as part of my program... so we aren't on different planets.
I'm more against the concept of "cardio" as a weightloss miracle. People are brainwashed these days to think they are hoping on the treadmill and burning off the bodyfat. They don't stop and look at the history of exercise. In the '30s if you went out and planted fence posts all day, cut hay, and then milked the cows ... you would have been thought to have spent a day BUILDING your body through activity. In the '60s if you went running... people would consider you BUILDING your body and your health... getting bigger and stronger. It was only in the '70s when the running/aerobics fad started turning into a multi billion dollar industry selling classes, tapes, shoes, clothes, magazines, etc... that cardio became linked to losing body fat... or getting smaller.
I worked out at Gold's Venice for almost a decade... and only saw one or maybe two pros EVER on a treadmill... and then only once or twice. Back in the days of Arnold... I doubt you would have ever even found one.