This isn't just a point-and-shoot camera like those you buy in the 5-and-dime stores. It takes a while to set up each shot and then many of the shots are long exposures.

For example, the famous deep field shots were accumulated over months of actual time and involved hundreds of hours of exposure.

And, they don't release everything because a lot are a bit boring more-of-the-same photos. They release the really stunning shit-hot images that make you realise what a good camera it is.

Just like in hollywood movies or TV programs when they shoot hundreds of hours and cut down to the really good bits.