The problem with that view is that a human cell is vastly more complex than a bacterial cell. Let's take transcription as an example. Transcription in bacterial

The problem with that view is that a human cell is vastly more complex than a bacterial cell. Let's take transcription as an example. Transcription in bacterial systems is well understood at the chemical level, can be reconstituted in vitro, and simulated with a high degree of accuracy. Transcription in Eukaryotes (such as humans) is an absurdly complex process involving oodles of regulatory proteins that interact in unknown ways, chromatin remodeling and 3D interactions, and adapter factors that recruit RNA polymerase in as yet unknwon ways. The whole process is extremely poorly understood and probabally won't be reconstituted in vitro in our lifetime. This is only one example of many cellular processes which are substantially harder to understand in eukayotes than bacteria. The lesson is that not all cells are created equal, different kinds of organisms have very different cells. Also note that modeling interactions between cells makes things much more complicated in a very nonlinear way.