This isn't quite the right analogy; it's not the difference between a fancy tool you can't service yourself and a simple tool you can.
It's like a world where everyone uses a particular kind of tool that works well and is expensive, but also… the standard. Everyone expects you to know how to use this tool to do a particular kind of common work.
And then you come along and say, no, we should teach people how to use a _different_, cheaper tool! It doesn't work nearly as well, and isn't what people in the "real world" use, but if you spend years familiarizing yourself with a completely different field, you can service and maintain it yourself!
It's like a world where everyone uses a particular kind of tool that works well and is expensive, but also… the standard. Everyone expects you to know how to use this tool to do a particular kind of common work.
And then you come along and say, no, we should teach people how to use a _different_, cheaper tool! It doesn't work nearly as well, and isn't what people in the "real world" use, but if you spend years familiarizing yourself with a completely different field, you can service and maintain it yourself!
You might not get many takers.