I tend to agree with you. Some people would like to think that this ‘visiting’ race is just a thousand or two-thousand years more advanced. It could very well be that they are 20-million years more advanced. Why would you bother announcing yourself? All you’d do is spook 95-percent of people on Earth.
We are unable to communicate with ordinary honey bee societies.
Until we learn to do that, there is no hope of communicating with aliens
UFO advanced technology, from 100 million years in the future, would appear as magic to the common lay person.
But a scientific Engineer would see Government secret projects, as just normal tech in the spectrum of science.
Common lay people erroneously believe Government secret tech is so well advanced. It is not.
The advancement all depends upon the education level lens you see things through.