As runners we are certainly outnumbered compared to the bikers. It would be nice to be able to filter courses so that only other runners are seen. It would be then easier to give thumbs up to those individuals. I find that it sometimes becomes impossible to isolate the runners amongst the riders to give recognition.
There are a couple run specific courses where you will not see the cyclists if that’s what you are after. I agree with you on some easier button pushing for “Ride On’s” while running.
Filtering the courses for runners only would have the potential impact of running alone. There simply are not as many around the worlds. It’s always fun to run up the big climbs and pass a cyclist or two!