I think that meeting ET lifeforms could be very humbling for the human race. We tend to think of ourselves as all knowing and the greatest of beings. I think that is, in part, why so many humans resist believing in aliens. How can we possibly be alone in this incomprehensibly vast universe?
When I was like 14 I found a phishing site, which I knew was a phishing site, but I wanted to experiment with it and see what they'd do. So I put in the (real) username and password for one of my empty side accounts.
My MAIN account then got hacked and I lost a few mill (which was a lot for me as a kid). I realised when I logged back into the account like a year later that I had once sent myself a neomail, from my main account to my side account with a message like "Hey me, it's me!!" so clearly the hacker just saw that that must be my main. Yes I used the same password for both accounts. I was a genius.
until very recently all of my accounts had the same password. Ito took me 10 years to realize how stupid that is.