he was struggling at getting a properly exposed photo with those. he said they were coming out super over exposed.
This is exactly what newbies experience when trying to photograph the moon from Earth. It's not intuitively obvious, but the light coming off the moon is essentially full-daylight bright. But the moon is small against a very black background, and depending on how the auto-exposure is operating, this often leads to guessing that the scene as a whole needs a lot more exposure.
I imagine that trying to photograph the Earth when a significant part of what's in view is experiencing daytime, is very much the same thing.