A floor plan is a beautiful abstraction. It is also the single biggest source of "that is not what I pictured" moments once walls go up. The problem is not the client - it is that reading scale from a 2D drawing is a learned skill.
Presence changes decisions
The moment someone walks their own hallway at eye height, the questions change. Is that doorway wide enough? Does the kitchen island crowd the walkway? Can I see the garden from the sofa? These are impossible to feel from above and instant to feel from inside.
Catch the expensive mistakes for free
A wall moved in EnVision costs nothing. A wall moved on site costs a weekend and a difficult conversation. Walking the design under a full day-night cycle surfaces the costly surprises while they are still just pixels.
Plans are for building. Walkthroughs are for deciding. Use both, in that order, and everyone signs off faster.