Hehehe. I'm going to give you a full and thorough explanation.
All the top drivers drive for Ferrari.
In the late 80s and early 90s, the 3 big names in F1 were Senna, Prost and Mansell. Prost and Mansell both drove for Ferrari and I have no doubt had Senna not died prematurely, he would've driven for them at some point (even if it were just 1 year).
In the mid 90s, MSc was BY FAR the best driver in F1. The most accomplished. This guy was regularly lapping his team-mates, no matter who his team-mate was. He won the titles with Bennetton, who were the best at the time. He then moved to...you guessed it...Ferrari. A team which had not one the title in almost 2 decades!
Currently, the best driver in F1 - Alonso. Who does he drive for...you guessed it Ferrari.
Are you beginning to sense a pattern?
Ferrari are synonymous with F1 and motor racing...more than any other team. Ferrari also get paid more money from the FIA than any other team in F1.
In Italy, there is a daily sports page dedicated to Ferrari. No other F1 team has a following that even comes close to Ferrari.
My sister - a typical person who knows little about F1. If I were to ask her to name a team in F1, the only name she will come up with is...you guessed it...Ferrari.
If you are a footballer, you want to play for Man Utd, Real Madrid, Barcelona or AC Milan.
If you are a race driver, you want to drive for Ferrari (just as Vettel said).
Phew...