First, a video from Dave Tate:
Bench pressing is for some reason an iconic lift. Supremely over discussed and over hyped. Yes, it is an important lift for building upper body strength, but far from the most important. It can also be substituted for various other movements and you can still achieve an impressive and powerful upper body. But we’re still going to bench, right? Of course.
What we have to remember is how easily this lift can fuck us up. No, I don’t mean the bar falling and causing some sort of trauma, I mean the havoc that the movement can wreak on our shoulders and lower back. As with any lift form is monumentally important, but with the bench press there exists more bad advice and information than perhaps about all other lifts combined. Couple that with the unmatched desire to push the lift further for general dick measuring purposes and we have a recipe for disastrous injury.
Rotator cuffs are a fragile muscle, and care must be taken to avoid the injuries they frequently suffer. Once you get your form in check you have also built a platform from which to build serious strength. Another good video from Tate, this one a bit longer: