I think if you take that to another extreme, you could say that forcing someone to write code with a computer versus a typewriter is an arbitrary rule. But the

I think if you take that to another extreme, you could say that forcing someone to write code with a computer versus a typewriter is an arbitrary rule. But there are actual reasons to enforce the tool - in that case, so you can execute your code in a similar environment to your peers. It is specific, but that's the point of the restriction.