Sure, scrubbing could pose a danger, akin to if you were glazing-waxing your car, and there is trapped grit-dirt between wax applicator, and paint, you will scratch the surface-finish.
To lessen this, I suggest pre-cleaning-dusting with at least a Carbon Fiber Brush, specifically used for this purpose, before placing an LP on an RCM. This will also place less wear and tear on your RCM's Wand Protective Strips, and Scrubbing Brushes.
I certainly cannot speak for everybody out there who cleans thier records, but I'd probaby be correct saying that even the folks who are using the very best state of the art RCM's made, such as Loricraft, Monks, Hannl, etc., and are using whatever cleaners, whether a one step, or a multi-step such as Walker, AIVS, Mo-Fi are resorting to scrubbing with seperate, dedicated brushes for each particular cleaning step-rinse.
For each step, apply first with Brush-Brush Pad, let those products sit, to first do thier job for a number of minutes, attacking-working on the contaminants.
Only then begin your scrub routine, use a technique following the grooves, in a forward-reverse motion, scrubbing both ways, cleaning a 1/4th to a 1/3rd of the record at a time, and then move onto the next section of record, insuring overlap. Use the best quality Brushes-Brush Pads you can afford. After scrubbing is completed, then vacuum off fluids, and continue to the next step. There is nothing that says a specific step cannot be repeated, and it may be wise to do so with horribly dirty records. Same applies with the pure Water Rinse.
It is always important that you NEVER let any cleaner-rinse dry on the surface! An example is washing-spraying your car with tap water, let the water dry, then look at your paint finish, and the resulting water spots which are then very difficult to remove.
I think most here will generaly agree with what I have written, and I hope this helps you achieve better results. Mark