Well, two reasons.
Firstly, I didn't mention this but I ripped off my calluses so gripping anything is painful.
Secondly, my grip was limiting me from doing more reps on the rows. So, I decided to strap up and double my grip training. Therefore, I get the benefit I need for my rows because I am not rowing for grip work but for my back. So I get that desired training effect PLUS I train my grip using the grip training I do.
Barbell rows are useless compared to dumbbell rows. Most of the time you can't barbell row with strict form so you end up doing a sort of quarter rep deadlift and you jerk the weight therefore diluting the training effect on the upper back. With dumbbell rows I can concentrate more on my back. Thanks for kind words..I am going to miss these heavy dumbbells once I graduate.