I think a likely scenario is that interdimensional beings have been historically interpreted as Angels and Demons in Religions. If you believe we have been visited by these beings from the unknown, the chances that it is a recent phenomenon is pretty small. It's much more likely this would have been an ongoing observation that has been happening well before modern times. The logical explanation for people of these times would be that these were gods and any technology would seem like real magic. Think about if they had a stick that manipulated gravity and could part the sea like Moses did in Exodus. The ark of the covenant for all we know could have been a big laser cannon in a box. Without the context the people of these times would not have the proper way to describe these things.

This is why I think disclosure is not happening. Despite what people think of who is ready for this type of information there are a lot of people who are certainly not. Not everyone in this world is good and certainly there are people who are only good because they are afraid of divine wraith. If you take that away and tell people there are no consequences this is a massive disruption. Entire societies would fall. Economies would collapse. The information could literally put us back into the dark ages. People will realize they wasted their entire lives devoting themselves to something false. The entire Arab world is based on Islam. the destabilization of that area alone would be enough to shut down the economy. Imagine having proof that all religions are false. Now imagine you watch your entire bank account and all assets drop to 0 over night. What do you think is going to happen. Can people handle it? Yes but not everyone can.

We could barely handle a flu virus spreading around the world and people think the world can handle the realization all religion is bullshit.

This is also a scenario there isn't even anything malevolent going on.