Carr has always kept a really low profile during the off season. Other than the odd appearance on his nephew's podcast, he doesn't maintain any kind of public presence. He could very well be wanting to leave or discontent, but his lack of public comments or presence during the off season is normal for him.
When public figures are out of the public eye, people start speculating why that is, because we have a tendency not to be comfortable with the unknown.
It's the same dynamic as why, when in the dark, we tend to see shapes that aren't really there. We fill in the missing information with our imagination. Our brains don't like the unknown or randomness, so we are constantly imagining patterns and connections that don't exist.
When a public figure doesn't tell us what they're thinking, our imaginations create what we think they must be thinking, because it gives us a sense of knowing the unknown.