You know all those comparisons pre-and-post-photoshop for models? Its same for those over-processed night shots (or generally any way over-processed shots, which most milky way shots are) I turn away in disgust. I understand folks who don't know much about this like it, but once you know what actually comes out of full frame sensor in 25s exposure (even if stacked) there is no way back.
Most pros do this too simply because it sells well to those who don't know better.