The air is very clear, the sun is shining and there's snow and hail sporadically falling. The wind is cold but the sun is hot.
There are no locks or blockages left in the world. What is left is a restriction on the human visual reference database. That's all I can still see. What would happen if alien ships showed up now? Everyone would think it's Russia, the army would be alerted. That's the logic we are dealing with. If they stepped out looking like reptilians or lyrans with fur and tail, religious people would shout about demons and atheists would think it was marketing for a new movie or game.
But that won't happen because someone has altered the visual database so that humans cannot see aliens or alien crafts. If something is invented and backed by science, it can be seen. If something is backed by strong belief, paranormal things can also be seen, but only by those who believe in them. Native reptilians look human, martians look human. Flying saucers and other ships look like jets, helicopters, balloons or hang gliders. There are some loopholes obviously, but personally I think the tic-toc UFO seen by US pilots are also a generic skin placed over the real image of the craft. That's why they look like blobs with no wings or anything. They probably added a bunch of such skins for unknown objects to prevent weird mislinking like the flying broom or the planes standing still in the air seen during the last year.
Where we move from here is along the logic presented by the make-up of the world. We can expand the access to the visual database by changing the generally accepted beliefs in the world, thereby making it possible for everyone to see what is in front of them. The earth isn't round or flat, it's multi-dimensional. Believing in what you see is to believe in what you already believe in, it's circular reasoning. Logic and reasoning in combination with observation, trial and error, can create belief in the unseen, this should be the way forward.