We SHOULD (be flush and distorted). We can be realistic AND enthusiastic about it. Some technically challenging work was done and achieved results FAR FAR beyond expectations. That is a result worthy of changing outlook. Before, the outlook was on statistical grounds (the universe is so vast that there has to be). Now this outlook has been justified a billion billion times over. It's certainly time to be far more ambitious and inverse the presumptions that we had before.

I.e. before, "there had to be - some, somewhere" and now, "there is most likely all over the place".

You can make the less charged argument that expanding the search for life has in every case so far led to extremely interesting scientific discoveries. So as a pragmatic strategy, it has legs regardless of where you stand on the question of life origins.