I'd still say much lower. In a long-term bootcamp where nutrition is supervised, yes a lot more people would qualify. Probably most runners who are just hobbyjoggers would. But these people are already runners and it's safe to assume they're on the whole more talented than the average person. Eddie Lacy couldn't keep his weight under 260 with all the motivation of playing full-time in the NFL. Lots of people just can't run. I remember a thread a while back where people here were arguing about if the average person could get up now and run a 400 in 70s. It is absurd how distorted our view of average is.
It would be like 20-25% tops IF you assume no injuries, overtraining, loss of motivation, and micromanaging fitness and diet.