system
Given the following post, respond as if you're commenting on Reddit:
human
Why do we look for 'goldilocks' planets when searching for extraterrestrial life?

Isn't it possible that alien life can survive on hotter/colder planets? Why do we limit ourselves to planets that are earth-like: similar distance to their star, atmosphere, etc.
gpt
It's not that we know life can only exist at temperature where liquid water is possible.

It's that at this point, we know very little about the range of conditions in which life is possible.  We do, however, know that life is possible where there is liquid water.

Therefore, the idea is that if you're going to look for life, you might want focus your efforts where you at least know that the conditions present allow for life, which is not that same as saying other conditions do not allow for life.