People just out to pound out miles don't care about nice scenery if they're focused only on the road/wheel in front of them, so why waste time plotting a route that has it? They'd rather focus on plotting routes through well-maintained roads.
Long group rides work better with stretches without intersections that the organizers have to pay to have policed.
And this:
Originally Posted by
tomato coupe
All the cool kids know the best routes, but we don't post them on Strava. (We want to keep them to ourselves.)
Those quiet, winding country roads with no traffic won't stay quiet and traffic-free if everyone knows about them.
For me, I get my hard training (and racing) done on Zwift. When I'm riding outside (almost never after getting hit last spring), I like to go for meandering rides where I can enjoy the scenery since worrying about traffic and all the stops and starts of intersections means I can't focus on getting a solid continuous workout in.