"Human-level intelligence/performance" is a term that is often used in many ML tasks to indicate a top-level performance by a very performant human, to compare the performance to, performance at that specific task which is being discussed. Perhaps not world's best human (but sometimes, like in AlphaStar), but at least someone competent at the task (for example in https://github.com/syhw/wer_are_we). It is just a term to use, to gauge and compare how well a network operates.

You could of course find cases where this term makes other sense (or does not at all), since English is a flexible language, but I think that in areas where we obviously discuss AI/ML, let's just use the de-facto term and make everyone's lives easier.