Q answering 'no' to a question if we are alone, doesn't mean it's about extra-terrestrial lifeforms.
It's your own perception of expectation.
I've believed my whole life in extra-terrestrial life, and had 2 experiences myself. Eye 2 eye.
When I came to understand what Earth is (NOT FE!), I came also to the conclusion they are not from outer-space. Or there must be entrances/exits on the poles. Who knows. We have no idea what's outside of this world, beneath our feet.