My understanding is that Zach meant the U.S. National Title all along, not Olympic gold. He felt the need to clarify what he said, because it could've come across as disrespectful to the other U.S. top teams or ungrateful for his and Madi's previous bronze medals.
In my opinion it is not disrespectful to want a gold medal (olympic or national) of any team. But I don´t know, maybe someone told him something.
. I realise all the skaters work very hard. So I'm surprised with the image he is portraying on social media, especially instagram. Yes, there are some posts from his work, but overall someone who doesn't realise how hard skaters must work, may come to conclusion that their lives are mostly fun.