Any reason is a valid reason in an arranged marriage. That is the whole point of "arranged" marriage.
Frankly any reason is a valid reason is any marriage.
Marriage is not employment that you are obligated to treat everyone equally.
A woman (or a man) are free to reject anyone for any reason.
Looks, money, height, caste, religion, race, skin color, baldness, color of their eyes, literally any reason.
My neighbour rejected a rishta of a guy JUST BECAUSE he has vitiligo