The close ups of the chest are usually to show the support or lifting of the breast. Not to show off the reviewers chest.
Often times, these images are taken by the person wearing the garment themselves. It's hard to get pics that aren't somewhat off unless you have a camera with a timer and a tripod. Again, how many people actually have this?
Bad lighting is something that can easily be adjusted in a photo editor, but somethings don't picture right without quality cameras.
Why would a facial shot in lingerie bother anyone? It's likely showing how the top looks. Showing how it highlights the shoulder line. And don't forget how it looks on the overall person. Makes for a pretty useful shot!
I think you are judging images far too harsh. Not everyone is a photography student, nor do they want to spent the time to mess with a photo editor.