This is a growing issue as Exit Glacier retreats at an astonishing pace.
The hike in question is the Overlook Loop at Exit Glacier in Kenai Fjords National Park (about 1/4 of the overall day tour). The trail has been extended several times in recent years.
The National Park is exploring alternate options, but for now guests have the option of waiting at the Visitor's Center, taking a shorter hike but not getting as good of a view, or going for the walk which includes some strenuous stretches.
As for the guide, they often have to chose where in the group to walk as it often spreads out, and unfortunately it sounds like he was needed in more than one place on this day, I apologize.