Yeah, Hoerner just wasn't aware. Rizzo or Schwarber hit the same ball, they're out by plenty and he's got no reason to be alert or to hurry. But Ramirez is really really fast, and Hoerner just had no awareness. Often an infielder can kind of see the runner's progress and realize if he doesn't have time for taps and crow hops; and if you know it's a basestealing speedster rather than a Rizzo, you know you're going to need to be alert.
Ramirez is very fast with 30+ stolen base season, and as the leadoff guy and the winning run, he might perhaps have then stolen 2nd besides. Fortunately he didn't steal, and Jeffress buzzed the next three guys no problem, so no harm was done. But it really was a clueless blunder by Hoerner. Good learning lesson that occurred at no cost.