system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] Is the history of UFO and alien abduction sightings different in this version of history compared to our own?

So in the MCU, it's confirmed that alien life not only exists, it's extremely common throughout the universe, and they make frequent contact with Earth. This is obviously different to our own timeline, where alien life hasn't been confirmed to exist at all.

Prior to Thor and The Avengers where the cat is completely out of the bag, what was the UFOlogy community like? In the MCU, there don't appear to be any "common" aliens like the Greys, the Reptilians, or little green men, so do alien abduction victims instead discuss how they were harassed by blue skinned humanoids like the Kree instead?
gpt
MCU alien sightings and abductions have a chance of being real - not a 100% chance, but a chance. 

As we know, the MCU's cosmos is complex and full of life. Asshole life. Jerk life. Life you know will be rude to your grandmother and knick the silverware. The kind of life you wonder how it got off its own planet, much less got to yours to start mutilating the cattle and tormenting the townies for kicks. 

As such, It is not surprising that alien interactions on earth are a thing.