What’s the hype around Marcelo Bielsa?

He had a great spell with Leeds, generational even, yet that seems to be about the pinnacle of his near 40 year career where he has won 5 major honours, and coached nearly 800 matches with a win percentage of just 45%. I understand he’s hailed for his Leeds role, but what is the hype around? Grouped with Argentina in 2002, grouped with Uruguay now in 2026.