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Humans are absurdly overengineered generalists
Humans are proportionally weak compared to arthropods, they’re slow compared to horses/wolves, they’re dumb compared to Artificial Intelligence, they’re fragile compared to megafauna like elephants, their socialization is nonexistant compared to true eusocial/pack species, and they’re clumsy compared to octopodes. They’re not bad at anything, however, and they can repurpose a skill for anything (e.g. they can socialize with strangers, they can reuse domain specific knowledge for other stuff, they can use one type of movement for a lot of tasks, etc) which is not super common. Most importantly, though, humans can continue functioning after almost any injury.
leg bones? There are 2, so breaking one is no more than an inconvenience in the short term until the endorphins wear off.
lungs? Again, theyre redundant. Function can be temporarily restored with TAPE!
Tendons/ligaments? Those are redundant too!
WE CAN EVEN FUNCTION THROUGH SEVERE BRAIN DAMAGE
IDK what aliens would think of us, between “what kind of idiot would design that?” and “thats so cool, what excuse/purpose can we find for one as a crewmember?”