“R’Chaim Ozer grodzinsky was of the same view,”
hmm…R’Chaim Ozer Grodezensky specifically made havdalah on an incandescent bulb ,lest anyone come and say he allowed it’s use..
‘I think a major reason is because one need not “learn” the mishna berura, just read it and see the psak. The arush hashulchan on the other hand is really a summary of the sugya.’
plus one could rather easily misunderstand unless contemplated