I actually heard Frank Tipler give a long talk of about 40 minutes on radio about the Anthropic principle several—perhaps even three—decades ago. At the time it was an exciting notion (and he was very animated when discussing the matter which made it all the more interesting).
Then I thought his notion likely balmy or eccentric, now I've no opinion as my brain tends to overheat whenever I think about it. ;-)
I’m always a bit dissatisfied with this way of thinking, if parameters were different it’s pretty easy to believe that there would still likely be a sweet spot for complexity that enabled life, it would just be somewhere else.
