Are actually being serious? Because if you are you are very wrong. As far as I recall Alonso was always the No 1 boy under his best mate Briatore also as I am sure that Hamilton did not have No1 status in 2008 and neither did Button In 2009 despite Barrachelo's blah blah blahs and machinations and he certainly didn't get 2010 when he joined McLaren and neither did Alonso when he joined McLaren in 2007 although his arrogance lead him to believe he should have done, and Damon Hill absolutely definitely did not have No1 status in 1996 unless you believe being sacked half way through the season is a sign of having No 1 status and neither did Villeneuve in 1997, hell I could go on for ever giving you names of drivers who won the championship without No1 status, are really ong to state that Alonso is the only one when in actual fact he did no such thing..?I think it's fair to say there's never been a World Champion, other than Alonso, who hasn't mounted his title defense without the benefit of No.1 status.
On your first point winning the world championship does not automatically give a driver the right to have No1 status why should it each season is new and each driver deserves his chance at winning, and on your second point there is nothing to stop a driver jumping teams or retiring once he has won the WDC it has happened plenty of times in the past Jenson did it, and plenty of other drivers have as well so what's in it for the team when a driver takes his crown else where?The very nature of the sport we love is to reward the World Champion with number one status for two reasons. His success in reaching the top brings sponsorship dollars to his team and his talent in taking him to the top has earned him the right to be given the very best opportunity to defend his title by awarding him No.1 status.
Plenty of McLaren examples - Lauda, Button, Senna...
No, but it is a very, very contrived measure of greatness, especially since you and I both know that given the opportunity Damon Hill would have in the 1997 Williams.He was the only driver in the modern era to take back to back World Championships off Schumacher. Regardless of what you say there's no argument against a statistic like that.