Wait, what do you mean?
Its like hearing a little kid say theyre going to be king of the world some day just you wait. At first its cute and even a little nostalgic. But over time it gets repetitive even more so when the cute little kid has a ridiculous cheerleader in the background constantly!! repeating the same refrain.
thusly Naruto saying its his ninja way one can live with, but when it gets stuffed down our throats by Hinata it loses some of the magic.
As an aside Id been wondering about Katsuyu myself for sometime now as to whether there were more since all we ever saw was Katsuyus. The notion hit me when all the little parts were destroyed that she could be one ENORMOUS Kaiju sized slug.