This is due to the positional adjustment of WAR. Ripken played most of his career when shortstops were TERRIBLE hitters. Ripken only posted a 140 OPS+ four times in his career, one of them a partial season.
For a comparison point, Corey Seager has done that three times already and he's only 28 years old.
In 1991, Ripken had a .940 OPS, 162 OPS+, and was awarded 9.2 oWAR for that performance. That's an absurd number.
In 2017, Correa had a .915 OPS, 155 OPS+, and received 5.7 oWAR. That's the difference between the average shortstop in the 80s and the average shortstop in the 2010s.
I'm not diminishing what Ripken did, though, I'm merely pointing out how he accumulated such an absurd amount of WAR.