I believe the end goal is some proof of extraterrestrial life. As sensing becomes more accurate, we may be able to detect certain biochemical signatures. Even of a hypothetical alien variety. At even great distances.

Its an answer to the age old existential dilemma: are we alone in the cosmos. And would indeed provide a modicum of hope for the future of humanity ;)

Exoplanet hunters rethink search for alien life

https://www.nature.com/news/exoplanet-hunters-rethink-search...