Yup.
It's very easy to understand why typical open sights can be very accurate. You can see that the rear notch is tiny and the front sight doesn't have much room to move around in it. You can also easily see when it's perfectly centered and lined up for elevation.
It can be sort of counterintuitive that peep sights are also very accurate because it seems like there's so much room for the front sight to move around in the aperture when you're looking through it. Also, it seems like there's no way to really verify that the front sight is properly centered.
When I started shooting aperture sights, it was hard for me to get my head around the whole idea of them and how they worked. But after I shot them for awhile it was easy to see that they did work and then I got to really like them.