It’s just easier to say “there aren’t any aliens” because there aren’t any.
Life, and certainly multi-cell life, requires more than most stars can provide. What life needs most is Time, and, most stars don’t live that long.
Never happen!
Physically impossible!
Anyone who thinks that doesn't understand the force of gravity.
;-)
You have no idea what ‘most’ stars can provide. There are billions and billions of stars in this galaxy alone, what to speak of the uncountable galaxies in the universe.
And you have no idea what type of ‘life’ is possible. I remember growing up being taught that life cannot survive in underwater volcanic vents... until we found that it can.
And you have no idea what exists beyond the sliver of the plane of our perception — the 95+% of the universe that is ‘dark matter’ and ‘dark energy’.