When Pep joined Messi hadn't completed a full season
Go an look at Messi's injury record before Pep and right after Pep left.
He doesn't take any safe route. They are offered to him. Roman was willing to bend the knee. City changed their whole structure for him. Agnelli's dream manager for Juve was Pep. The beating Pep's Barca gave Bayern caused them to change their philosophy.
Why would any one in any profession that has access to the best go and make their jobs harder...only in football you hear this stuff
When Pep arrived at Barca, they barely finished 3rd and had to do CL play offs in his first season. They literally took a risk on Pep and shelved Mourinho.
Zidane will never have Pep's options because Pep has a notable playing style that is mimicked across all levels of football around the world.
Struggling with lesser clubs is what you do when you can't get a big job. That's the reason Ancelotti is in Everton and Mourinho is in Roma. No elite manager is taking a step down when they can get a big job.
We've seen the difference between an elite coach in Tuchel and Lampard on the very same players.