I also get that some people have allowed their rational / conscious mind to take over to the point that their subconscious is blocked from putting through alternative ideas. When we are children we are open to the world, and as we mature we start to shut that down. As adults we have to make the conscious choice to listen to the voice in our head (our subconscious) because our rational mind wants to dismiss it.
For some it is really fear based. They don't want to believe in other realities because it may threaten a religious belief or a reality that challenges what they were taught or learned. It is easier to discount it than to accept the possibilities.
People that have had the experience of alternate realities / spirits already accept alternate realities are real. It may be confusing to understand (there are many alternatives and the universe is a mystery that we learn about piece by piece), but the underlying belief of its' existence is there.
I don't see a "trigger time" in which everyone is enlightened and sees alternate realms BUT I do get that each individual will have their "moment" when they come to the realization. Some people learn this early on, for some they are in their mature years and other don't realize it until the start to visit the spirit realm at the moment close to passing.
And that is all I have for this reading. Thank you.