That’s how I read that. Our “search for life” (at least here on earth) is more accurately described as a search for DNA exactly like our own, with minimal substitutions. There are things that might be, but probably are not, non-carbon and DNA based life, such as:
“It’s possible they’re here right now and we simply can’t see them.” Does that explain Trump and his cronies? There is certainly a certain non-human vibe around them…