It's against pilot wave theory. Pilot wave theory is another form of hidden variable theory, that has been proved wrong again and again.
Source: check wikipedia.
Source: check wikipedia.
In non-relativistic situations, Bohemian mechanics (pilot wave theory) makes the same predictions as more mainstream interpretations of QM.
Pilot wave theory, if simulated, still requires you to run all the same calculations as (say) the Many-Worlds interpretation, in order to know what the pilot wave is doing.
In fact, the pilot wave will still contain everything that MWI does: Multiple timelines, vast assemblies of nearly-independent universes, Earths beyond counting, etc etc. What PWT does is add in some nearly-epiphenomenal particles, and declare that only these count; that any observer described by the pilot wave is a philosophical zombie.
I have objections to this concept. :P