Well said. Adam and Eve came into this world bare-naked. I doubt that God provided them with a wardrobe of fine clothing (if you believe in the biblical Creation). If you believe in evolution, well it is clear that early humans didn't have clothing either. Eventually humans made and wore clothing for practical matters, such as to protect them from the elements. Eventually, as civilization developed, some humans made finer clothing to differentiate themselves from "lesser" humans who weren't as well off as they. Therefore the wearing fine clothing is a function of our own vanity. We don't wear fine clothing to impress God. We wear fine clothing to impress our fellow humans and to establish ourselves higher up in the pecking order. So admit it everybody. It's not about God at all. We wear fancy clothes to church to show off to each other.
If that is the reason one is dressing up, God knows it. On the other hand, if one is dressing up in a genuine effort to honor God on His holy day, He knows that too. I freely admit that I have been guilty of the former.......but going to church in ratty attire in a vain attempt to appear "righteous" is no better, IMO.