Or maybe I shouldn't put words in your mouth

I suspect it highly likely that sentience has risen (and in some cases fallen not long after emerging) all over the Universe. I suspect many sentient species have found a purpose which pushed them on to greater things than we have ever achieved.
I suspect our species will die here on this rock, and soon in astronomical terms, without ever having achieved anything of merit. Aliens will maybe observe our folly as our radio waves pass by their astonishing civilisations and laugh at us.
I can't help but lament the reality and inevitability of that future.