I have always looked at R/C as a temporary hobby for many modelers. After learning how to zoom back and forth down the runway, and doing non-aviation maneuvers (read: 3-d), they get tired of the whole boring routine.
At least, that's what happened to me.
That's what the vast, vast majority of the RC sport fliers find. There are a huge number of them, but there is also a constant turnover. The number of people approaching RC the way we do, or FF fliers do (or at least as a lifetime craft/hobby) is a microscopic fraction of the total. If you took the AMA membership of maybe 250,000, took out the drone idiots and RC Sport fliers (the constant turnover types), and sport FF and sport CL, you might find that there are as few as maybe 15,000 total, maybe 10,000 RC modelers, and the other 5000 split up between FF and CL. Everybody else is in a semi-continuous churn of guys who go for a few months-years, then go do something else.
That's *why* the AMA turned itself into "ARFs 'R Us", the advertising market is dominated by these toss-together systems where you have to know nearly nothing about what you are going to get into the air, quick. It requires continuous "churn".
There's nothing terribly wrong with that - who am I to say they are "enjoying themselves wrong"? - but it's basically an adult toy industry, not modeling the way we would normally understand it.
What I think is likely to happen is that these RC sport fliers are going to, pretty quickly, disappear, and not end up in *any* form of modeling, because they will not want to go to the bother of following the requirements. Some of the "serious" RC types might shift to CL. It wouldn't take many of them to significantly increase our numbers, but the RC sport fliers will likely just be gone entirely.
Brett