Very true accept you can do exactly the same thing with a $30 Hudson sweep arm and remove any incidental dust out of the stylus's path.
disagree.
a brush only gets larger pieces. a brush cannot dramatically reduce static. in fact the friction from a brush increases static which holds mirco-dirt to the groove. negative ions from anti-static devices reduce noise.
but agree the brush from the Hudson sweep arm does have a positive net effect. just not nearly what anti-static is able to do.