Nathan Taylor, Why Astronomers and Journalists should pay heed to Biologists about ET.
Years ago I wrote something that mentioned similar issues: Extraterrestrial Intelligence: A skeptical view. This was long before the Kepler space probe. However, Taylor seems to be saying the fundamentals of the issue have not changed.
As Taylor points out, there is an ad hominem issue here. Frank Tipler, who was a forceful advocate of the no-ETs view in the early and mid 1980s, subsequently became a “crackpot” (Taylor’s word, but I agree completely). However, this does not invalidate Tipler’s earlier work.
Taylor also points out that for practical (creating life) purposes, the universe is still very young. Star formation will continue for a long time, a necessary condition for life. ETs may yet turn up, but you will need to be very patient.