I don't think article is comparing like things. Biological _systems_ are indeed complex and reliable, but biological _processes_ are not. They fail all the time

I don't think article is comparing like things. Biological _systems_ are indeed complex and reliable, but biological _processes_ are not. They fail all the time -- if they didn't there'd be no need for an immune system (and on the flip side, there'd be no genetic mutation and so no natural selection and evolution). To compare like to like, look at processes vs programs, not systems vs programs.