Putting the peep and loop on during the build is pointless. You have to shoot a bow for 50-100 shots to settle the string and cables. Then you have to move the loop up/down during arrow flight tuning and have to customize the length to fit you and your release. And they don't even know the size of nocks you'll be using, so they can't tie the loop on properly anyway. Then you need to adjust the peep's rotation after shooting it in. Not to mention we don't all need the same peep height.
So, yeah, it's dumb to install them at the factory. But if someone doesn't know better I guess it's OK, since they aren't very seasoned archers anyway. But those same newbs would be better served having a bow that's up for them specifically.