It makes sense in that, even in the real world, the real humans can be counted on to pay attention and intervene to some extent. That's an important counterpoint to the vivid thought experiment of "how could you possibly expect someone to pay attention after hundreds of hours of flawless machine operation?"

Unless you're talking about getting rid of the steering wheel and deploying the current system as Level 5. In that case, yes, interventions should count against it.