Is there a problem here in listening to the wrong people? That author admits that this demographic is quite different from what might emerge organically; might

Is there a problem here in listening to the wrong people? That author admits that this demographic is quite different from what might emerge organically; might their answers be equally as different? I'm not downplaying the inventiveness of this method for getting feedback, but I'm worried that it's a little misguided to use this for development purposes.