For the sake of training knowledge, would some one like to add these lying bench row's to their back workout and tell us the results? Giving it a fair 3 to 4 week try. Just talking about it's merits only goes so far. We all would need a pro and con report.
If working into heavier sets, I myself, find it a very uncomfortable and restrictive movement when lying prone on a bench.A heavy pad helps a bit, but not all that much. Have also tried them on a incline bench, with seems to give a better feel to the exercise. I get more serious lat/back action going with BB or DB rows, but maybe that's just me. "T" bar rows are another excellent lat/back exercise, much preferred over that pictured lying version. For me, and others I have trained with.
As far as the hernia thing goes, building the lower back muscles and the all important ab wall (including the obliques) can go a long way to insure less stress for a potential injury. If hernia's are anyone's main concern than never do DL's, cleans, squats, leg presses, ab work, etc.....including most standing exercises. BB can build a very strong lower back, with the two important links of the glutes and ham's. Good Luck.