No one has suggested denying poor people entrance to a church.
Dress is not irrelevant. If you come before your father and mother in a slobby shirt and jeans, or if you come before them neatly, cleanly, and properly dressed it makes a difference.
Modesty is a Catholic virtue, it has a meaning in the exterior life and the interior life, you cannot dispense with one or the other.
Yes God cares about how you dress. He most certainly does. It matters, and you are responsible, and you should do your duty in regards to this responsibility.
‘When
she was thrown into the air by a savage bull in the amphitheatre at Carthage, her first thought and action when she fell to the ground was to rearrange her dress to cover her thigh, because she was more concerned for modesty than pain.’
Pope Pius XII (Allocution to the girls of Catholic Action, October 6, 1940). [of St. Perpetua]
‘
Great modesty and great propriety does the blessed Paul require of women, and that not only with respect to their dress and appearance: he proceeds even to regulate their speech. And what says he? “Let the woman learn in silence”; that is, let her not speak at all in the church; which rule he has also given in his Epistle to the Corinthians, where he says,“It is a shame for women to speak in the church” (1 Cor. xiv. 35.); and the reason is, that the law has made them subject to men."’
St. John Chrysostum, Father and Doctor of the Church
“Beyond fashion and its demands, there are higher and more pressing laws, principles superior to fashion, and unchangeable, which under no circumstances can be sacrificed to the whim of pleasure or fancy, and before which must bow the fleeting omnipotence of fashion. These principles have been proclaimed by God, by the Church, by the Saints, by reason, by Christian morality."
Pope Pius XII