This is why I push for people to audit with a clinician before they pay to ride, and to know your event organizers well too. Most clinicians make their preferences and teaching style obvious. Every now and then you might get a group where it’s a former student or old friend and sometimes it can be difficult for the clinician to pull away from them.
Some clinicians can handle big groups and some can’t. Some can expertly handle varied skill levels in the group, and some cant. This thread reminded me of my clinic with Peter Gray in 2020. I entered in the BN slot with a green TB, and I was shocked to see I was put in the same group as two Training level riders and one Novice rider. Later, I learned this decision was done more for rider skill level than horse, but Peter did an excellent job providing challenging exercises for all that did not “dumb” down the level for the Training riders, and did not overface my green hose. So some clinicians can definitely do it. I have been that person in other clinics (not Peter’s) where I’ve felt I did not walk away with any new knowledge, in part because of being put in a lower level group: so even though it worked for Peter, I totally push for groups to be homogeneous in rider/horse skill level to keep things smooth and timely.