syntax, not to be argumentive, but yes, all things being equal, one should hope, that for the asking price of these Loricraft, or Keith Monks type RCM's, with their thread feed-point nozzle designs, that they should do a better job.
But the first sentence in your post confuses, and gives IMO a untrue account on what RCM's can do, and can't do.
The RCM such as Monks, Loricraft, Hannl, VPI, etc with a platter provides a platform for placing record, one applies fluids-cleaners, whether one then scrubs manually, or automatically is dependent upon the design-features of the RCM, then the Vacuum removes Fluid.
Taking the factor of cleaner efficiency in account to the extreme, to make a valid point to you, and others, if one only used straight water to clean their records with, one could come along after, with a 16hp Shop Vac, and even at this level of extreme bar vacuum which could easily lift a Bowling Ball, it is not going to fully remove-lift contaminants off the record.
That the RCM is only part of the equation to really clean records. Agree, or no? Mark