Were the terms of the purchase in the contract that the purchasers weren't allowed in the room? If so, then no. That would be breach of contract and wrong.

To be clear. I'm not a fan of paid upgrades for things that are already physically included but inaccessible without payment. But I get it because it still brings the price of the thing down to those who don't care about having the extra thing.

If it brought down the price of the house, people who didn't need those things would absolutely take the deal, and that's the point.