By definition any ATC is an expert (for want of a better word) on airspace, you'd be a little worried if they weren't. I haven't ever walked into any Dick Smiths electronic superstore and told them they sell sh!t flux capacitors and then sat down at the till and designed them another one and insist on them throwing the old one out and selling my design.
Owen, I'm afraid that anyone with any electronics experience in Australia would tell you that this is a particularly terrible example
These days staff would be lucky to know what a capacitor is, let alone know where to find them in the store (assuming they have not been removed to make way for more mobile phones).