The Importance of Understanding Our Humanity

Most of the time when I watch any show with aliens or any movie with aliens and I'm like, how did they build that ship? That's what I want to know. This will always gets me everything alien. Like at some point we can only understand them through the lens of our own understanding of humanity, right? So we're like, how do they build the ship? Like how do we know on their planet they don't just grow ships? If alien species exist they're probably so different from us. It's more likely that some dude got drunk and was stumbling home from a bar and then came across a goofy looking dude who had big head and big eyes before he passed out