I guess if talking about the earlier GTs and had the idea of adding various features, you may also have said "GT is for racing, adding photo mode is pointless it contributes nothing to racing", "GT is for racing, knocking over cones is too silly for that"). I don't think being a purist is the way to go, there's no limit of what to add in the games.
I've always thought that when you call a creation of your own with specific words, you have to stick with the words' definition unless you're arrogant enough to think you can redefine these words.
I think Kaz and Polyphony Digital (.... and most of us) should study what is the Gran Tourism about and its history.
The idea of an opened world makes sense when you're aware of what the origins of the terms gran turismo are about.