You don't want your franchise player having to scramble every play and it's just a statistical fact that a QB is less accurate when having to throw on the run.
The line is indeed a huge problem since Josh can't go through his normal progression and is having to improvise on the run. Those are not high percentage plays and are quite often plays that lead to Josh trying to do too much.
Nevermind they suck at run blocking too.
Our pass rush hasn't been great as of late even with Von. Frazier is having to blitz more to get good pressure lately, which I'm glad he realizes since letting meh QBs pick our weak secondary apart has become beyond frustrating.
Tom Brady had a line that could protect him and give him time. If Brady had our line, he'd be on his back most of every game and would probably be out for the season at this point since he's nowhere near as mobile as Josh.