The short version: there are no inherently transformative activities, and no inherently transactional ones. The difference is the frame around the experience. That frame runs on one mechanism —
Brief
Open the gap
Introduce a question volunteers can't yet resolve with what they already believe.
Guide
Stay present
Meet people where they are — Tourist, Traveler, or Guide — instead of racing to finish.
Debrief
Make meaning
Ask what they experienced and whether it matched what they expected. Then let the silence work.
Same paintbrush. Same house. Different frame. That's the whole idea — and it's cheaper than it sounds.