I think alot of what producers do are for themselves. Producers are obsessed with technical aspects and styling, there is an ego and an art that they cannot let go of when producing content, they are not the owners of the content which means they are paid the same. So as long as the content sells, they get paid. So the motivation isn't high enough to do things for sales. Hence you still see things like this head jewelry, lingerie, boring decor, desert pics.. actually outdoor sets probably wouldn't even exist much if it wasn't for producers wanting to save money and them getting better technical images due to the sun. because its not about sales.
Sadly there's not a ton of top producers who are owners, so there is a major disconnect when it comes to what sells vs what producers produce.
Owners only know what is currently making them money. Except what is currently making them money and doing well is based on what they've been doing and the members they've attracted so far.
Honestly if a little common sense was combined with allowing yourself to put your personal taste and their brand/reputation aside and do what sells, site's would be doing alot better. I don't mean dumbing down the technical aspect but making it less fashiony and oldschool.
Producers do this because they get alot more respect among their peers, it's more "professional" looking and it's what they want to be known for