So, knowing this, why do men wear suits to worship services?
Anne Hollander’s Book, Sex and Suits: The Evolution of Modern Dress, explains that the modern day business suit is a direct descendant of medieval armor, the clothing worn underneath plate armor, the clothing worn by warring men. As the warring/power class evolved, the means of waging war changed, and so did the clothing - with the suit of armor done away with and it’s modern-day equivalent replacing it, the business suit (became mandatory dress for men in the house of parliament).
That’s why suits are worn in business - they’re the modern day suit of armor that men wear when they go off to fight their battles.
Knowing that, why do men wear suits to church? I’ve never much cared for the practice, so long as it’s been seen as the “established” dress of priesthood. But, personally, I do like to wear a nice suit now and again, though with a bevy of small children I often opt out for garb more easily cleaned.