Were priests just dressed in secular garb in the early church?

I was reading about the gift that President Biden gave to Pope Francis and wondering what a "Fiddleback Chasuble" was. What I stumbled upon on wikipedia was this interesting tidbit that it pulls from the old Catholic Encylopedia: > The priest in discharging his sacred functions at the altar was dressed as in civil life, but the custom probably grew up of reserving for this purpose garments that were newer and cleaner than those used in his daily ministry, and out of this gradually developed the conception of a special liturgical attire > > https://www.newadvent.org/cathen/03639a.htm I was skeptical reading this in wikipedia, but I trust the Catholic Encyclopedia. Now, this might have made sense in the olden days, but with all the movies (with all their great information and well research facts about traditional religion) that have been produced in the last hundred years, one might be apt to think that the vestments of the Catholic priesthood were anything except secular garb as they seem to resemble Jewish or pagan priests. Is this just an anachronism? What evidence do "ecclesiologists" have that early priests were just wearing their Sunday best, like everyone else?