I understand that, but if you are doing rack deads 6 or 7 inches off the floor working up to a max, you would be handling weight that is greater than what you would on your normal deadlift. If you are doing say sets of three working up to a one rep max then stopping do to your grip giving out does not make a lot of sense. Should you work on building you grip if it is lacking, yes. Should you do all pulls with straps, no. I rarely use straps, but if my grip is stopping me from moving weight that my back and legs can handle than I think it would be silly to not use straps. Then maybe work on grip during a different part of the workout. But I guess that is a personal preference.