It doesn't matter if you can afford to buy the watches or not. The people in those stores are shop assistants, they might be selling posh products but they have exactly the same job as a shop assistant in a Timex outlet, Tesco or any other shop. Nothing wrong with that at all but it doesn't give people the right to be snooty.
A good shop won't care if you have the money to purchase there and then or not. But they will have such pride and confidence in the product and their service they will be happy to show them off, in the knowledge that if and when you can afford one of their products, be it Tesco's beans or Blancpain, it's there you will spend your money.