There's a tendency for people to think that HR software and other internal tools are less important than public products, but if the company is allocating employees properly, that doesn't really make sense.
The engineers working on this HR software all passed the same technical interviews that everybody else did. Amazon could have easily allocated them to some flashy consumer product, but management decided that it's important to have a team working on HR software. So either somebody made a horrible miscalculation when they decided to build the HR software, or this work is equally valuable to all the other work happening.
