I would also hesitate to automatically rule anything out. The Fermi paradox exists for a reason, and it makes logical sense that if life can appear in one place, it can (and will) do it again. In a universe as large as ours, it’s basically inevitable that we will eventually discover some form of alien life, even if it’s just single-celled organisms (assume we as a species survive long enough).

I just wanted to throw my 2 cents in because whenever anything like this comes up, you get a rush of two kinds of people: “omg aliens!” and “omg look at all the idiots who thinks it’s aliens; everyone knows aliens aren’t real”. It frustrates me because the existence of alien life shouldn’t be controversial. If anything, imo, the idea that alien life doesn’t exist should be controversial (the Fermi paradox exists for a reason). Just because we haven’t seen it doesn’t mean it doesn’t exist. It’s honestly scarier imo if it doesn’t exist due to the implications of it.

— someone who woulda probably been an astrophysicist if they’d been given a chance earlier in life