My statement wasn't meant as a disparagement of biologists. Simply that there is a lot of "conventional wisdom" out there in the world that turns out to be false.

When I started grad school (mol bio/genetics), there was a laundry list of things that "never happened in biology". By the time I finished grad school a lot of those items were removed from the laundry list.

And, as I'm sure you're aware, the inability to find something is not evidence that it doesn't exist.