There would have to be Space Aliens for them to come here and be under our noses. I don’t believe in either.
There may be single cell life out there, but, the chances of there being multi-cell life, or, any higher life forms would be unlikely, heading towards Astronomical.
Not from space. From another dimension.
They space thing is a ruse.
It’s nice to be so certain about things you can’t possibly know anything about.