That's a really interesting metaphor. I worked with Dan years ago.

It seems like the talk was at CraftCon 15 and called "Beyond Features: rethinking agile software delivery with Dan North".

I couldn't find it, but I found a similar talk he gave at a meetup that discussed surgery: https://youtu.be/EoJFWdhv8q0?feature=shared&t=1564 or https://www.youtube.com/watch?v=lz5HBtDl-1A