Sephardim dressing up as Poles aristocrats in 17th century is surely to the glory of the revived Polish state … or, in other words, somewhat absurd.
The way it works – Sephardim are mostly for blending in reasonably. They dressed like Arabs among Arabs … So, now they are surrounded by Litvish-dressed people in B’nei Braq and Leikwud – so they assimilate into this community. If they were to really have the same shitot as Ashkenazim about maintaining their traditions in every aspect – they would walk around in colorful turbans.