Gift Shops

What's the bloody point of having gift shops at tourist attractions. I'm not talking about attractions like theme parks, but places like national trust sites. I recently got back from Scotland and in one shop I saw a calendar for PARIS!!! What is a calendar for Paris doing for sale in Scotland? In the shops in Stratford there are bits and pieces of tat for sale with LONDON (complete with beefeater and union jack) plastered all over them. If you want a souvenir to take home with the name of that place on it, at least have the common decency to go there to get it.