Yup. They’ve got to work together for a while to get good, then draft a QB from a perceived good class. And in the interim, defense has to be built with good pass defense and great pass rush. Philadelphia just beat KC in the Superbowl using cover 4 defense, no blitz. That worked because they owned their own backfield.
If I were a GM, the first thing I do, even before I hire the head coach, is to find the best offensive line coach in the business and pay him whatever he wants.