As I've been saying for years, if aliens are indeed visiting, they must not want to be completely outed. Otherwise they would do so themselves. If they wanted to reveal themselves to the world, no government could stop them.
Conclusion: They don't want to be disclosed.
I completely agree 100%
I think that aliens are not much different to us and they simply have a practical economic interest.
Its anybody's guess what that practical interest is, but abduction ratio between women and men is 5:1. And that comes up a lot in abduction stories that they use women as surrogate mothers for aliens' own children. These abducted ladies of ours are usually groomed from childhood till menopause, and when they get too old for childbirth abductions stop.
It is easy to imagine that women in a very rich and advanced alien society would shun child-birth because it so painful. I bet our own ladies who love having babies, would readily pass child birth part onto surrogate mothers from poorer countries. Apparently there is such service available in US? Obviously I can't prove it, but this
surrogate mother exploitation sounds as a very plausible explanation for economic motives of aliens and why they are so keen on keeping it secret.
Given that advanced life forms, like humanoid ones, are extremely rare in the universe, aliens wouldn't have many places where they can perform this surrogate-mother business in secret. So aliens are prepared even to loose their own crews and craft, just to keep it secret. I just read another UFO crash case, where our military turned up on the site within minutes and hovered up all the evidence. And that super fast "hovering-up" of evidence is consistent from one UFO crash to the another.
So, military wants technology, aliens want surrogate-mothers and there you have perfect conditions for a long lasting trade agreement. Of course, like in every good trade agreement between the elites people get screwed. All I am saying is,
let people have their cut in the deal and benefit from the progress that small drips of alien technology will bring us.
For example, there is no reason why this surrogate-mother business can't be done under supervision of our governments and these women who took part would be financially compensated. Government supervision would guarantee that our interests and health standards are protected and aliens would get much more open access to more women. That solution is much better than the current one in which these abducted women get practically hunted down like a game and traumatised for life.