The issue is that for most things we don't want the fuzzy nature of biology in our systems. Yet some people try to shoehorn it into everything. It is OK for chat or natural language things, which are directed at a human, but most other systems we would like to be 100% reliable, and not 99% or failing after a few years, and at the very least we want them to behave predictably, so that we can fix any mistakes we made, when writing that software.