I've found that a lot of people just aren't interested in an intensive/expensive class when they're just starting out. Its too much investment in something they might not even like.
I point them to GUE but its a hard sell to someone who's brand new.
I can't speak for all GUE instructors, but I'm more than happy to have someone schedule the first two days of Rec 1 to see if they like diving. If they do awesome and we'll schedule the rest of the class; if they don't they haven't committed to the full 5-6 day program.
As mentioned by others, the focus is different for Rec 1 versus Fundies. Since Fundies doesn't certify you to do anything new (other than nitrox and take other GUE classes), its purpose is solely to challenge students and generate improvement, even if they come through the door with Tech-rating level skills. Rec 1 is about teaching what it is to be a diver, what do you need to know about/to visit the underwater environment, and HOW to practice and get better. It is balance between challenges and experience.
The beautiful thing about Rec 1 with a never-dived-before student is how quickly they pick up horizontal/mid-water/neutral if that's the only way they've ever been taught to do it. Their "normal" becomes how we, as DIR practitioners, dive. This transition happens quickly in Fundies with those taking it straight from "typical" OW class, but NO WHERE near as quickly and efficiently as the learning curve of those who start with a Rec1/neutral-always class.