Intense gatekeeping in the electronics community is precisely why communities such as Arduino could flourish in the first place (and their creators could benefit financially). Ultimately, people just want to get stuff done and Arduino is a way of doing it. If you go to Stack Exchange, someone will tell you to buy a college textbook and come back in six months once you understand Laplace transforms. An artist working on an installation doesn't need that. A person building an automated cat feeder doesn't need that. In fact, almost no one does, it's just something we torture EE students with.
I think a lot of the negativity toward Arduino boils down to saying "nooo, it's supposed to be hard!". But if you want the Arduino crowd to get more interested in your field of expertise, you need to build them a ramp, not to tell them they're not real electrical engineers.