Originally Posted by
Vahnavoi
And is this usual for your games? In D&D, with its default of Great Wheel cosmology? A character, and player, can, at level 1, know there are other planes outside the Prime Material and start planning whether they want to visit them or not.
You are falling prey to the presumption of predestination. Placing an element in a game as a place that can be visited, does not mean it will be visited - that choice can be left to the players. With the addition that there can be a window of opportunity for when they can make that choice - miss that window, and that place is off limits.