Thanks for the partial list of requirements for life. It’s clear that there are many stars, but that the chance origin and sustainment of life is infinitesimally small. How this plays out in the Drake equation is a matter of speculation IMO.
There are some people who really don’t want to believe in extraterrestrial life. There are those, many more I think, who really want to believe in extraterrestrial life.
I saw Kaku on TV and he proceeded as though an infinite number of universes was a matter of fact, not speculation. That is one way to blow up the numerator in the Drake equation. As far as I know, there is no reason to believe that there is more than one universe.
“there is no reason to believe that there is more than one universe.”
That is a highly controversial position to take these days—you can do your own web search to identify many very smart folks who do not agree with it.