No offense, but if you can't do BB presses without shoulder issues, either your form is off or you have some kind of muscle imbalance.
Also, I don't do any DB presses and my pecs grow fine from BB bench. Just do paused reps and you'll put more emphasis on the bottom end ROM where the pecs move the weight. Just look at any bench press specialist powerlifter and they'll have very well developed pecs from paused BB benching.
Not true, genetically there's three types of AC joints. The third has shoulder impingement when doing barbell OHP. That's why Eric Cressey is not a fan of them.
lol I have noticed all I do is whine about genetics and leverages.