Plus often they’re not especially skillfully made and I’m pretty sure some people are reacting to very thin acidic, sometimes woody and vegetal, cups and assuming that if they don’t like this,
Another possibility is just that light roasts can just be too fiddly for most people to want to bother with. Between the money for equipment and time spent brewing it, it’s probably just too great an investment for most people to take something from at least acceptable to them to being great, after a while when you get things dialed in and the stars align.
Sure, I was just trying to say that while some people will dislike the flavor of the currently vaunted light roasts, even when properly brewed, I think there is a pretty sizeable number of people who would like them well enough, but just find it too much hassle. Especially outside of the specialty coffee scene, where you see more and darker roasts, in my experience
When Costco or someone puts out a dark roast on the shelves, they generally aren’t competing for customers that drink single lot beans from your favorite café, they’re looking to get the people who find McDonald’s coffee or Dunkin Donut’s good enough, but want to save a bit of money by brewing at home.