Why No Audibles?

It would be really nice.
I'm tired of seeing the defense line up against my off-tackle run left (for example) with a blitzing LB or DT poised right there or in full-on run blitz but unable to call a run right or deep pass audible.
I get it matters not to the guys who just create playbooks and game plans and then click sim - but some of us actually love playing every down. Even if the QB via AI (or based off of say 4 pre-player selected plays in Strategy) would call audibles that would be something.
I'm assuming it's not in the game because the game has already calculated the play before I even click "play" (I'm essentially just watching a video)? It's the only reason I can think of as to why it's not included and if so that's a real shame.
It would also be nice to make substitutions on the fly too. I know there are the package options but again that's all done upfront and feels more for the guys that "click sim".
I'm tired of seeing the defense line up against my off-tackle run left (for example) with a blitzing LB or DT poised right there or in full-on run blitz but unable to call a run right or deep pass audible.
I get it matters not to the guys who just create playbooks and game plans and then click sim - but some of us actually love playing every down. Even if the QB via AI (or based off of say 4 pre-player selected plays in Strategy) would call audibles that would be something.
I'm assuming it's not in the game because the game has already calculated the play before I even click "play" (I'm essentially just watching a video)? It's the only reason I can think of as to why it's not included and if so that's a real shame.
It would also be nice to make substitutions on the fly too. I know there are the package options but again that's all done upfront and feels more for the guys that "click sim".