It does validate the benchmark but that doesn't make the benchmark particularly useful. In both Python and Julia if loading your data from CSV is a bottleneck you'll do something else. If it's not a bottleneck it doesn't matter.

If you've got a Python code base it would cost far more in terms of effort and dollars to convert it all to Julia than to just find a better way to load data. If you've got a green field project and CSV reading is a big portion of the task load then it makes sense to pick Julia I guess.