Most people just don’t enjoy getting down on hands and knees to mark tracks, or do it long enough to develop a feel for where to look or what tiny details to look for - every track may not be seen, but that’s why individual tracks are marked to anticipate the path. If he’s in the aspen, grass and pines like the photo shows, there’s usually plenty of sign to follow. It can be too slow to be practical, but I see most guys give up really quickly.
Rocky areas can be hard to stay on tracks, maybe some thick Pacific Northwest stuff I’m not familiar with.
Regardless, tracking should be practiced before it’s needed, and the best time to track is when it’s super fresh. I bet if we polled the average hunter in the field they would clueless about it unless there are obvious tracks that Ray Charles could follow.