Existence or absence of alien life has no reason to impact how little or how much space is out there. The universe is big ^[citation^ ^needed]^ so odds are pretty good that there is, was, or will be life out there somewhere other than here.

en.wikipedia.org/wiki/Fermi_paradox and en.wikipedia.org/wiki/Drake_equation are worth a read in case you’re not already familiar. Drake equation is focused on our galaxy but the same line of reasoning ought to apply more broadly.