That was my first thought too. They're way better than USPS but the error rate is still substantial.

I used to run a facility that got ~200 packages a day split between the carriers. At least a couple of times a month we'd get mis-deliveries, or packages claimed to be delivered when they weren't, etc. If you figure 60 a day were FedEx that's 1200 a month or less than 1% error rate. But if I didn't have a couple of FedEx reps I could call when things went sideways it would have been a nightmare.

Even with all the technology mistakes still get made.