You don't need pancakes to be an effective o-linemen, you don't need pancakes to be an effective o-linemen, you don't need pancakes to be an effective o-linemen.
Got it? Furthermore, the pancake SA is only the third most important attribute when it comes to getting pancakes. Strength and Blocking are both more important.
If you're not putting heavy points into Line General, you're doing your whole O-Line a disservice. You make FIVE players play better with one ability, and you're one of four players on the field at any given time who is given the opportunity to make other players on the field better via a SA, so you should make good use of it. Furthermore, it allows less of a need to put points into stamina and confidence, which frees up points to train on your agility/vision/speed.