The correct answer by a rookie who just screwed up and cost the team 10 days of practice without him, would have been "I will need to talk to coach about what he means, I want to do everything I can to improve."
His failure to get a shot and then coming back this week and doubling down on not getting vaxed and then this defensive answer is not showing the kind of leadership or maturity needed to succeed at QB. He looks like he has all the physical tools, but so much of QB is what is upstairs and right now there is no one home there.