Wouldn't it make sense to take the group along and have everyone turn around when it is impassable? Is the scouting because the group is physically incapable of

Wouldn't it make sense to take the group along and have everyone turn around when it is impassable? Is the scouting because the group is physically incapable of going the extra distance when route finding is needed? From my limited experience with Iceland's terrain I think I'd be worried about "newcomers" behind me losing the trail so I think I'd be even more wary but perhaps it depends on the group, equipment, etc. While there isn't much dense foliage out here in the Rocky Mountains I've seen many people get separated even in alpine terrain. Especially in boulder fields where groups routinely get separated and I've seen several called for rescue independently after searching for hours.