There is an apprenticeship system in jazz. You teach the young ones. So even if the musicians weren't personally that likable, they felt an obligation to help the younger musicians. ↗
If I had to describe myself to an alien I'd say I was bigger than the average human, enjoy a drink or two with a good meal and have a bigger head than most. I'd also say I'm really handsome - especially if they were a female alien. ↗
A perfect record does not mean that someone is the greatest. Rocky Marciano never lost a fight, but I never hear anyone say he's the greatest heavyweight champion of all time. ↗