Actually Freidman was a highly regarded baseball player in high school and went to Tulane on a baseball scholarship. He suffered a bad injury in his freshman year and then a second bad one his sophomore year, which unfortunately ended his college baseball career. His lack of baseball time in college was due to injury and not that he wasn't good player or didn't understand the game.
The other fact is, Andrew Friedman knew the Rays owner Stuart Sternberg even before Sternberg bought the Rays. They knew each other from their investment/analyst brokerage days. When Steinberg bought the Rays he brought Friedman along with him for his Rays front office. Friedman's first job was as a player development director and not as an Asst GM like Hahn. All the years Friedman was in Tampa, they were always the lowest payroll in baseball or close to the bottom. Thus he had to learn developing a farm system because he didn't have money to spend on expensive free agents or make trades to get established veterans.
In fact, in a interview with Friedman while with the current Dodgers, he was asked by a reporter why he was so successful. He alluded to the fact, that learning to be a GM with no payroll in TB, forced him to learn how to build a baseball team the correct way, which was through the farm system. Hahn never had to learn that aspect.
This is why Friedman was so valuable to the Dodgers. He could now spend endless money, but still also bring his knowledge of building a successful farm system to the Dodgers.
If you go look at the good successful younger GM's today like Mike Elias in Baltimore or Mike Chernoff of Cleveland and you look at their resume, they worked up through the organization in different critical jobs. They also played baseball.
I'm sorry but, Hahn had none of these modern day executive training responsibilities as the top young GMs have experienced.
I get there are other aspects of being a great GM other than scouting, like negotiating deals, knowing how make solid trades, hiring good managers, etc, but obviously Hahn hasn't learned any of those skills either.
The bottom line is, Hahn sucks as a GM. The longer he is here, the longer it will take for the White Sox to ever be a successful winning playoff contender.