I know this is an old topic, but it came to mind again...
Yes it is appropriate for people to dress neatly and respectfully for a dignified religious gathering, but why does it have to be a full suit with collared shirt and tie?
Why does it have to be a full dress or skirt and jacket?
Sure, we would find it distasteful for a person to arrive in swimwear or work overalls or other inappropriate attire, but why does it have to conform to strict standards?
One characteristic of a "cult" is that its members must "dress in a way that conforms to dictated standards"