I don't disagree. I think that Rattler is the future at QB. But I also think he needs time to develop. Some of that will come with practice reps but given the very few practices in season, even the #2 doesn't get many reps. A lot of Rattler's learning during the season will come in the film room and from learning from Carr by talking things over. He'll also learn from being on the sideline and seeing what adjustments are made and why. He doesn't have to be the #2 QB for him to develop.
I think he is the #2 QB but it's really not that big of a deal if he isn't listed #2. Like I said, I think it's possible that Haener would come into the game if Carr went down in game due to his extra year of NFL experience and not wanting to put that much pressure on Ratter. But, I think it's also possible that if they have a week to prepare they would start Rattler over Haener. Particularly later in the season.
But, in the end, I don't think it's that big of a deal. Rattler is 1 to 2 years away from being the full time starter unless Carr has a major, long term injury. That is if he continues to develop the way he has so far.