Where do you get that impression from? A few years ago, there was a
study that showed that teams on the 1-yard line ran the ball 73.97% of the time since 2000 and were successful 53.88% of the time. Teams passing from the 1-yard line posted a 48.34% success rate.
Not a huge difference, but it's data, not opinion. And the study was already far into the pass-happy era of 2000s era WC/spread offenses, where teams simply weren't investing anymore in the kinds of fullback you used to see like Lorenzo Neal, Darryl Johnson, or Tom Rathman. If they had, I would expect the run success rate to be higher.