Ok, sure, I guess some people have the luxury of a dedicated bike path with no intersections. Here in the city, I can’t get close to my (low) top speed because I hit a res light every block or two. When I used a suburban trail, it was mixed-use, so I had to go even slower to navigate safely around pedestrians and potholes.

bike paths can be counterproductive and sometimes dangerous if badly designed. they are good for learning to ride at the weekend but not worth it if you commute daily, it's better to keep your line and learn defensive riding.