The majority of poor pics are done on purpose - took me about a year into this hobby to realize this.
This is why a great number of ads have cropped backbox and front of cabinet pics. Or poor lighting.
Ever wonder why so few ads have a picture of the front of the cab present? It’s not because they forgot to include it.
To me it’s comedy now and I especially like the ones where one pic will have perfect lighting and the next the lights are dimmed. Or even mixed image aspect ratios where seller has manually cropped to hide flaws. Or selective glare...
A cropped backbox pic just makes me smile at this point. Trust me, sellers know that if they step back another foot, the trashed edges of their pin will be perfectly visible.
Photography lessons not needed - the majority could write a book on the subject.