I agree with all this. Emergent gameplay, to me, feels far more arbitrary and far less purposeful. I think a single vision is the way to maximise purpose.
It may be similar to having multiple endings to a story, which make none of them feel like the necessary thematic resolution. Imagine a film...
This way, you’re still free to discover any shrines at any point, but if you choose to follow the plot points of a main quest narrative, a select few of those shrines transform into traditional dungeons (perhaps even novel items in each).
Of course, if you choose not to follow the main quest...