> Having people actually try to make the code runnable would make things so much worse...

I’m not sure I follow here. For me, programming is an iterative process: write a small chunk, test it out, write the next bit, and so on. Not being able to execute code seems like it would make that process harder, and force interviewee to essentially come up with the code “fully formed” all at once, which is hardly a useful or realistic skill.