system
Given the following post, respond as if you're commenting on Reddit:
human
CMV: Aliens have never visited earth.

Let me start by saying I was really into the whole UFO topic for several years. After extensively following pretty much every new UFO sighting or alien conspiracy I could find I gradually went from being a firm believer to feeling like it's very likely that all alien/ UFO accounts can be explained by hoaxes or unreliable eyewitness testimony.

So many of the most credible seeming sightings end up being debunked as hoaxes. Similarly, so many credible sources of eye-witness testimony, such as the various military personnel in the disclosure project, end up revealing themselves to be pursuing money and or simply lying about their expertise such as Bob Lazar(claimed to work at Area 51).

I would love for it to be true that aliens have been visiting earth and its all a big coverup but I can't think of a single credible example that hasn't been thoroughly discredited. CMV.
gpt
The view "Aliens have never visited Earth" is quite a strong stance to take, considering Earth has been around for 4.5 billion years, we have had very little time to record or collect evidence. Saying we currently have no evidence or that the current stories do not indicate we have been visited does not discount the age of the Earth or the very short time humans have been present for it. 

Note, this is not an attempt to prove we have been visited, just that an absolute statement such as "never" should not be made when we have really very little evidence either way.