It's worth pointing a few things out:
1. A lot of high end grinders can be configured to deliver a consistent dose (weight) of grinds, if people/coffee shops are lucky enough to own one of these then yes you are completely right, there is no need for scales but only because technology has done the job for you.
2. In the short time that I have been a member of this forum I have learnt that many of the people here are very knowledgeable and are more than willing to give in depth help when asked, insulting them by referring to them as pedants probably won't help you.