nobody believes we have intellegence satilites that can read a newspaper from space,with 100’s of reviewers looking at the data/ photos daily, but none have ever photographed a UFO?
All this recent stuff, from the past decade...came with new technology introduced to the Navy/AF fighters. This is probably the advancement that made the difference.
As for the reason being here...no one can lay out an idea that makes sense or has any facts behind it.