> That would be like saying you can judge the quality of a cereal-brand by its box. Special-K? That is really special.
> The Book might be full of lies or incorrect information no matter how beautiful its cover is.
Cereal "might be", but almost nobody has motivation to do so — this is market differentiation to tell you what you're buying.
Compare and contrast:
https://i5.walmartimages.com/seo/Kellogg-s-Special-K-Origina...
https://duckduckgo.com/?q=budget+cornflakes&t=iphone&iar=ima...
https://www.kaufland.de/product/338169035/?search_value=cere...
None of these will be surprise Weetabix in soy sauce. None is actually a frozen pizza. None is garden fertiliser.
Similar with books and youtube videos. It's not a claim that "beauty is truth and truth beauty", it's a claim the thumbnail/cover tells you what the video/book is about.
For "quality"? Good branding used to be expensive, before GenAI (now I'm not sure). If you could afford it, you could afford good content; if you could only afford good branding or good content but not both… it happens, of course, but it leads to angry refund demands IRL, and no organic viral growth for videos.