This is an important distinction and I agree with your point here. Re-using work you did is not the same thing as forcing an encounter in the moment regardless of what the PCs do.
In my opinion, the most important aspect of RPGs, the thing that separates them from every other form of game, is player agency. And that agency is Always On. If the PCs come to a fork in the road, they choose right or left. If there is "no discerning information" for that choice, the players are no using their agency to discover the distinctions. The game really does belong mostly to the players, not the GM, and it is up to the GM to be able to communicate the world to the players when they investigate it enough to make meaningful choices. But to be clear, flipping a coin at the fork in the road IS an expression of player agency, too.