, Before carefully looking into the issue I had basically the same beliefs as you do. Note that I find the probable existence of psi really annoying and didn't start looking into the issue because I wanted to believe.
What is the evidence that convinced you?
Questions like that can't be answered due to problems of social epistemology. If I give you two pieces of evidence then it's assumed I've given you my two most convincing pieces of evidence and that I don't have any other pieces of evidence, and thus that you should update even further away from the conclusion that I've reached. If I regularly talked to you and could keep up a thread of conversation, and if both of us didn't anticipate needless antagonism involving the presumption that the other hadn't already considered things that they'd in fact consider...
[Post redacted 'cuz I unfairly and carelessly misrepresented someone's views (Eliezer's). The messages of this post was: disbelief that aliens visit Earth in spaceships is a bad reason not to look into ufology. My apologies for this ugly post.]