No they are. It all constructed like that, houses in the 50’s has that threaded system. Today they are mostly soldered all the wayAs per this schematic re outdoor faucet:
Are all such faucets constructed like this, viz. the faucet screws into an adapter?
I had a plumber tell me that to replace my faucet, I would have to do so from inside the house. I.e., tear off sheetrock, etc. I assumed he was saying that because he assumed the faucet was sweated onto the supply line.