which admittedly is more refined than ordinary dress, but is not even close to royalty.
Even if you don’t get to the goal, you should aim to reach as close as possible.
Don’t make the torah into your source that you call upon whenever you want to justify what you want to do.
That is precisely why you should accept that an eidel yid dresses eidel. Even if you can’t “cite” a Chapter and Verse in S”A that mandates being eidel.