Probably stupid but hear me out:
• We try to pet/make friend with everything
• several different species are documented to have raised abandoned/lost humans (famously wolves, but monkeys, parrots, cats and more have raised humans)
• animals that can harm/kill us typically leave us alone (cougars don’t tend to attack unless there’s kittens around, black bears are small but they can 100% kill you if they wanted but they just kinda go away, orcas are smart enough and big enough to hunt us if they wanted to but there’s 0 wild cases of death by orca)
• there are species that are so chill with humans they literally domesticated themselves
• humans get an oxytocin boost when we see cute things, we want to be friend!!!! (Cute is subjective, some people see bugs as creepy some see bugs as friend, there’s always someone who sees something as friend!!)
• we don’t have the best natural defence or offence meaning we ride a lot on “you don’t bother me I don’t bother you” cause idk about you but I got nothing if a horse decides it’s my time to go (yeah we can build armour and weapons but we have to actively make and use them, we don’t come ready made with a suit of metal armour)
In conclusion, I’m very convinced that if we find sentient alien life either they’d find us non threatening at worst, actively adorable and cuddly at best