I've taken to wearing a head covering at all times. It's a temperature regulating thing.
If a church told women they couldn't wear any head covering, your point would be relevant. I don't know any that do. Do you?
I suppose not.
The whole point, though, is that St. Paul makes this statement with the same emphasis as other statements. Many of the Reformed who argue vehemently that St. Paul says something else, will ignore this completely.
The Bible alone dogma appears to be practiced more like - some passages of the Bible alone.