You know, there's more than one parallel to religion here ); since newcomers seem to approach the "holy trinity" of HTML/CSS/JS as act of revelation. As in, there just has to be a deeper sense in CSS layout models, and if I fail to discover the reason why CSS properties and olde HTML presentation attributes are essentially representing the same thing with different syntax, it's my fault for not recognizing the grand plan behind it. Thus, if I finally managed to see a dubious use case for it, I've advanced one step in the hierarchy of the CSS church. That's how military hierarchies are build - by giving people ranks, thereby using their desire not to loose height energy aka sunk cost fallacy. Of course, unless you're doing CSS/web design all the time and nothing else, soon you're leaving your trail of knowledge acquisition in the form of a CSS framework product or consulting, at which point you have a vested interest in CSS staying opaque.