> It is “important to remember” precisely because these days people are not remembering this and speak with a sense of inevitability about discovering life elsewhere

Could you expand on this a bit. Whether someone speaks with a sense of inevitability or not, why is it important either way? Why is it "important" to remind people we haven't (yet) found life on other planets?

Why are the existing gaps in abiogenesis "important" to point out?

What is so "important" about these things?