15 days ago you said you were doing Stronglifts/another program and your bench and press “so weak”(you’re correct)!?
-6 weeks is very short if you can’t stick to that you’ll get absolutely nowhere in terms of serious lifting.
False, building your back up from all angles is one of the best things you can do as a lifter as well as for overall athleticism, posture, shoulder health, looking visually solid etc etc