So microphony isn't microphony unless you say so. Gotcha.Microphony refers to the tendency of an electrical component itself to produce an (unwanted) electrical reaction to a mechanical stimulus, as you well ought to know. For example, a thermionic valve modulating a signal due to external vibration. A cartridge produces wanted electrical impulses from a mechanical input. What you are describing is not microphony, it is undesirable mechanical coupling. I do not need to 'try it myself'. I have been using turntables for around fifty years and am perfectly well aware of their mechanical properties.
I have never suggested a tonearm cannot make a difference. What I am suggesting is that in this specific case, I do not consider the tonearm to have been the major contributor to the very apparent difference between the two turntables in question. This was not, incidentally purely my opinion, but also that of two people very well acquainted with the design and manufacture of products for the audio market.
https://www.vinylengine.com/turntable_forum/viewtopic.php?t=19779