And if nothing else, it helps to close a gap (well... turn a big one into two smaller ones) for those who like to make leaps of faith between points of understanding instead of looking for answers in the middle.
The world has heaping piles of money. Some minuscule fraction is spent on basic science, and you're all high and mighty about lack of access to drinking water. Give me a break.
You want perspective? It's all around you. If you need it from a one-word answer that succinctly responded to the original question, then I'm afraid you need to look elsewhere.
The examples that you quote citing colossal wastage of expenditure, ring quite true.Exactly my point. But really, wasted expenditure is wasted expenditure,plain and simple- There cant be any justification, more so, citing another wasted expenditure. Analogy- how rational would it sound, if a convicted murder says in trial "But I killed just one guy.Go,look at some war-ravaged place in Africa what people get away with".
Actually,I believe basic science encompasses a lot more than astrobiology-Even the issues I pointed out, would stand to gain a lot,from advances in basic sciences, and perhaps need more investment.
Perhaps you feel that discovery of ET life would changed your life for the good- I would completely agree with you, if it could make us humans healthier,welathier, or otherwise more intelligent. Till then, I would wait and watch :-) and... read the next interesting thread on HN!
That said, I'd think it'll be much less spectacular, possibly yet another condition added to the pre-requisites required for life.
What's interesting though, is that if they actually find evidence for microbial life on another planet far away, then it's mighty likely that said planet already has far more complex life on it (taking into account the time it takes for light to travel through space, we'd be viewing outdated information).
The question is not whether it's possible, but whether it's common.