True. But there have been many great coaches that haven’t set a revolutionising philosophy in football terms or created something where others had to create something in return to defeat it.
Helenio Herrera who was a football innovator both as a player and as a coach doesn’t get the recognition coaches get these days and that’s just because football wasn’t the media run business it isn’t today and the global football community didn’t exist.
Yes it’s true he invented catenaccio, that abhorrent mindset to defend (many idiots give Sacchi the credit for that way of playing) a match and plan to hit a team’s weaknesses due to wanting to attack and score goals. But it was revolutionising and it was successful, it was something never seen before, yet nobody talks about him except for those that really know their football history.