I can see that if I made @
Elfcrusher's assumptions then
I might not see the enjoyment and value in a sandbox / living world approach. You showed how some of those assumptions can be set aside, and I can testify that as a DM what you describe is my SOP. In OOTA, due to unfortunate circumstances the party landed their ally in Blingdenstone in prison. That ally's sister had been captured and I had things set up for the party to help her. They now haven't, and I've had to roll events onward taking that into account. It's a long tale of woe that at this point my PCs are oblivious to. Depending on how things unfold, they might never learn of it.
If I didn't derive satisfaction from the act of imagination itself, that might bother me.