Imagine that we flew to Mars and found there a medieval society, just a notch above discovering bronze tools. Do you think we will just land in the middle of a village and announce something? That would only create a new religion. Instead we would simply observe the natives.
Similarly, if aliens land on Earth today, what will they tell us? What do we need to hear? Humans are terribly divided, and aliens aren't likely to unite the civilization. They would instead cause more violence.
If aliens exist they probably understand that all the troubles of humans are self-inflicted. We have enough land to live on; we have enough food if we grow it wisely; we have the technology to further improve life. Why instead do we have one tribe of savages beating up another? Why our elected leaders do everything in their power to make things worse? Until that is corrected and sanity prevails aliens don't need to land. Whether it can be corrected is a completely different question.
Best, most logical reasoning on this thread, so far.
BTTT
Nice to see someone come forth with simple logic. Continue, please.