Do you think RPGs are valued purely as decorative accessories, to be fashionable or eye-catching, and not as (abstract) devices designed to perform a function?
Of course not. But that wasn't the point. The point is you have to judge "quality" in context.
So 5e has to be judged in the context of its ability to supply the best D&D experience (which is the goal) and not just some amorphous gaming experience.