Car dealers used to profit from people's emotions and ignorance about the product. That's a reasonable exploitation of ignorance because car buyers should know

Car dealers used to profit from people's emotions and ignorance about the product. That's a reasonable exploitation of ignorance because car buyers should know about the car they're buying. Today, car dealers sell consumers to banks using cars as bait people. Exploiting people's ignorance of dense financial/legal contracts seems extremely abusive to me.