Comment by randcraw

Data created automatically is not the same as human curated data, though both are synthetic. Auto-created data often suffers from a host of demerits (duplication, bias, error, unnatural distribution, irrelevance to learn the intended domain, etc, etc). Human curated data usually avoids these pitfalls, and thus is far more valuable when training -- otherwise all human teachers would be equally good. So auto- vs curated- data are incomparable when training naive neophytes like ML models, or children.