Getting Treasure at any point in the game is very bad
You will want Golds in this game, no question about it. Lot's of expensive draw pieces and you want to be able to add 3 or so pieces a turn once your draw is up. Goldless player will fall behind in deck development and have less flexibility in the end. Drawing this deck is a piece of cake anyway, the Golds aren't going to screw up consistency.
To add 3 pieces you need 2 Barons anyway and those give you $8 already, so that between 4-5 Fishing Villages, 1-2 Bishops and a left-over Copper or two you don't need the Golds. It isn't that you wouldn't want them in your deck, it's the opportunity cost of not getting a Hunting Grounds instead.
On top of that, if you get more than one and certainly if you get more than two, I'd be quite happy to play the Thief I gain off a Bishopped Catacombs a few times before my good Catholic friend, conforming to custom, grants him absolution and a place in heaven.
