You can keep saying it all day, but nothing he has done yet screams 1c, so he has 'earned' nothing. He is, however, our 1c (apparently) by default. Kinda sounds like another center we had who has been lambasted over and over again for being put in a position he didn't 'earn' doesn't it?
The situations are similar, save for the fact that for the past two years there has been a better option than Bozak for the top line.
Bozaks first couple of years on the top line? Sure whatever. Kadri was still just a prospect and in the name of chemistry the KGM line wasn't going to be broken up.
His third year, the playoff season when Kadri broke out, he was lucky that Carlyle decided to give all the tough defensive assignments to Grabovski to insulate him and Kadri. Had the situations been reversed between Bozak and Grabovski I doubt Tyler would've fared much better.
And now the final two years with #1C Bozak. Kadri continues to progress as an all around player, while Bozak becomes complacent in his position, becoming a lazy defensive player to go along with his black hole offensive self. Collapse after collapse neither Carlyle or Horachek thought to break up JVR-Bozak-Kessel when they were at their worst, while Kadri made the most of what he had with an oft injured Lupul, Clarkson, and a merry go round of middle six tweeners. Look at every stat, advanced and traditional and Kadri comes out ahead in every single one save face offs (which, conveniently I might add, Bozak supporters have latched on to as the end all be all of what makes a successful centre).
The fact of the matter is, the Leafs didn't see any success with Bozak as a #1C, and it's long overdue that they change things up and start giving prime minutes to someone else, someone they've
drafted and
developed, not someone who doesn't fit into the long term plans of the team and hasn't shown any commute meant to bettering himself.
Kadri may not fit into the long term plans either, but it's about bloody time he's been given his shot at the #1C role.
TL;DR: The main difference in the situations is that someone was ready usurp Bozak but was never given the opportunity to do so. In the case of Kadri now, there is no one currently who can take the #1C job from him.