Well, a person is not a legit champion based on how they win the belt. It doesn't matter who Punk could beat or how he could win. It would all come down to how he defends the title. As it's said, it's hard to win the title. But it's much harder to keep the title.
Look at Chris Jericho. He beat the Rock and Stone Cold in the first night to win the Undistputed title. If how you won the title made you legit, that would've made Jericho the single most credible champion of all time.
Triple H on the other hand, has been given a couple of titles by default. He didn't win a match to get those titles.Yet, due to his reigns after being awarded the title, he became one of the most credible champions of all time.
Basically, no matter how he wins the title or how many times he wins the title, a champion is legit based on his reigns, not his title wins.
Look at Chris Jericho. He beat the Rock and Stone Cold in the first night to win the Undistputed title. If how you won the title made you legit, that would've made Jericho the single most credible champion of all time.
Triple H on the other hand, has been given a couple of titles by default. He didn't win a match to get those titles.Yet, due to his reigns after being awarded the title, he became one of the most credible champions of all time.
Basically, no matter how he wins the title or how many times he wins the title, a champion is legit based on his reigns, not his title wins.