Lamar is game script dependent . He needs their crazy run game with all the rpos and misdirection to open up passing he's comfortable with Nothing wrong with that. Take Jared Goff for example If McVay dumps the run game and Goff drops back 45 times the Rams would not be as effective. Right now he needs the run game working to be a efficient passer as well as a solid defense to keep the game close. Maybe he improves and maybe their offense is tailored to pass more at some point. He's fun to watch and their style obviously is working.