When you reach a certain point of progress and start moving some serious weight, the first part of the body which will often give out is your hands. The muscle in the back and legs are much larger and even with strong hands, you’ll still benefit from using straps to keep up with the progress.
This isn’t to say you shoulder always use straps. Far from it, just use them when you need them in order to work those muscles harder like in the rack pulls and rows shown in this video.
The straps in the video are from IronMind. They are pretty cheap, but high quality.