A race win for any team boss is a fantastic achievement.
But he, unlike the other 9 people directing F1 teams, doesn't have to manage a team that actually:
- Does the Research and development for the car
- Designs of the car
- Builds the car
He just had to organise a group of people who modify an already fundamentally good car, which IMO is a significantly lesser task than other chassis constructors.
Of course having a Ferrari engine instead of the Renault doesn't hurt either.