The US hasn't even stabilised its environment, healthcare and any number of other important areas of basic human needs. Money for finding extra-terrestrial life would be better spent on earth fixing the mess. Or use it to get us to mars. At least that fits with a "plan B" since humans existing "only on earth" is still a bad idea. Same goes for moon exploration / asteroid mining. Good ideas. Raw resources shouldn't be…
Why not try all of the above? The mess you mention is unfixable. Mars is very very far away, but worthwhile. The SETI and other research is worthwhile as well. Even if it is a null result, you learn something. R&D itself makes us learn somethings. If you won't do this stuff until other important problems X & Y are solved, you will never do the interesting things and progress will stall for the species.
So weird. I've stated quite clearly in that post in favor of space travel. Yet that apparently means I'm against anything interesting and you assert that I suggest we must wait. Nonsense. I just think we should spend money on plenty of other things before searching for aliens. Eg space travel!
And the mess is fixable. Yes, the mess of healthcare, environment etc. Fixable.