A village tradition through and through - anyone doing it in cities nowadays is quite clearly of village stock.
Would you be so kind to give examples of city traditions.
This is old Polish tradition, that was observed by christian Poles (where they lived was irrelevant). If now some couples choose to do something else is their choice. People who live in village are normally more conservative and traditions tend to live longer there (that is case in Polish, German, French etc villages). Don't try to make divisions, where they don't exist.
The only differences in wedding traditions exist are in different parts of Poland (south, north, Małopolska, Wielkopolska etc.) not between city and village of some region.